Wireless network is now the new need of everyone, its importance is self-evident, and the most common user contact is the operator mobile network and Wi-Fi now around us. Needless to say, LTE network, control point It is based on the network provided by the operator, the coverage of the base station and the uplink and downlink capabilities of the mobile phone baseband. Among them, except for the mobile phone, it is basically an uncontrollable factor.
In contrast, in the real wireless network experience, the importance of Wi-Fi will actually be higher. First of all, one of the most practical, tariff issues, compared to the use of mobile networks need to pay attention to the remaining traffic, certainly still Wi-Fi can be used more openly. After all, even if the so-called unlimited traffic package, after using a certain amount, there will be different speed limit measures, and the network experience will be greatly reduced.
To improve the Wi-Fi experience, I believe many of my friends have some understandings. We can easily divide them into three links, namely, network bandwidth, routers and other wireless output devices and mobile terminals and other terminal receiving devices. The bandwidth is the easiest. Understand that if you want to be fast, you will have to access a high-speed and large-bandwidth network. Under the circumstance of sufficient conditions, the network speed of 100M fiber must be faster than 4M small water pipe.
The selection of routers, stability, maximum bandwidth support, load capacity, dual-band 2.5GHz and 5GHz, multi-antenna MIMO technology, etc. are all considered. Of course, the routing is also doing well, and the general purchase is reliable. Brand, the right price will not make a big mistake.
But maybe you will still find that even if the network above your home is good enough, 100 Mbps fiber to the home, high-end router configuration is complete, you still can not enjoy the ideal wireless network experience of your own ideal, not only often inexplicable Delay, in some corners with more obstacles or distant distances, even the basic stability of the connected network is difficult to guarantee, Wi-Fi is always disconnected and reconnected, and there are still thoughts to brush or eat chicken.
If all of these situations occur when you are using your mobile phone, then no doubt, most of your mobile phones do not support 2x2 dual-channel Wi-Fi technology.
2x2 Wi-Fi is a new feature supported by Qualcomm's mid- to high-end SoC. With dual-antenna MIMO (Multiple Input Multiple Output) technology, existing resources can be better utilized without increasing spectrum resources and antenna transmit power. In the case of better network coverage and higher data throughput, the network signal is better and the network speed is faster (requires that the router wireless network transmitter also supports MIMO technology).
'Wired resources are unlimited, but wireless resources are limited'. Wired networks have great advantages in this respect. When there is a need for extension, more fiber can be solved, and one can not do more. However, wireless networks rely on the 'aviation route' of invisible electromagnetic waves. Therefore, there are mutual interference problems. The spectrum resources themselves are limited. They also need to consider the attenuation of the propagation process and the different electromagnetic wave diffraction abilities of each frequency band. The limit is even greater.
In order to make use of valuable spectrum resources, there are technologies such as high-order modulation, multi-antenna MIMO and multi-carrier modulation. The two-channel Wi-Fi we talked about today mainly uses the characteristics of dual-antenna MIMO for us. The commonly used smartphone Wi-Fi capability has brought huge improvements.
MIMO involves both spatial diversity and spatial multiplexing. With spatial diversity technology, the transmitter can send the same signal from different antennas. After receiving multiple signals at the receiving end, the multiple antennas can mutually verify each other, thus obtaining greater diversity gain. Improve the reliability of the signal. In areas where the signal coverage is weak, you can use this feature to ensure high reliability of the connection. Naturally, it has a better experience than single-channel Wi-Fi. Of course, 'mutual verification' is just convenient. A simple statement of understanding, the reality is that multiple antennas can use the more complex composite coding form to achieve greater enhancements, such as space-time block code and beamforming techniques, so we don't have to go into it.
The spatial multiplexing technology is the opposite. The multiple antennas at the output end respectively transmit different signals, and the multiple antennas corresponding to the receiving end are separately received, thereby achieving a multiplication of the channel capacity. The advantage lies in the transmission of the bandwidth itself and the antenna. The power requirements have not improved, mainly to increase the utilization of the spectrum. The simple metaphor is like the construction of two lanes or even multiple lanes between the two places, the efficiency of transmission is naturally raised. Similarly, here is only Conveniently understood, the actual situation also involves the establishment of the channel model, the complexity of the mediation and other details, but these are the problems that manufacturers and Qualcomm need to solve, let us enjoy the actual results.
Because of the support of spatial diversity gain and spatial multiplexing gain, dual-channel Wi-Fi can use 2x2 antennas to achieve parallel data transmission and channel fading suppression. In terms of actual experience, there is no wireless network coverage at home. Less dead angles, and Wi-Fi delay, packet loss rate, uplink and downlink rates, etc. will also be more ideal.
Maybe some students will ask, I also know that 2x2 Wi-Fi can significantly improve the network experience, but let me add another antenna design for Wi-Fi in the internal space of the mobile phone. It is really a courtesy. Can't do it.
Yes, first of all, this antenna may reduce the capacity of the battery by a few more points. Students who are sensitive to battery life may not be very good at the time. Secondly, the antenna design itself is a technical activity, and the antenna clearance is TRP (Total Radiated). The impact of Power, the overall transmit power) is on the head of the manufacturer. If the field test fails, the carrier's standard can not be met, and naturally there is no possibility of mass production.
And this is another big problem solved by Qualcomm's 2x2 Wi-Fi solution - the performance of dual-channel Wi-Fi can be achieved with a single Wi-Fi antenna. Of course, Qualcomm is not doing nothing but a different way. The LTE antenna next door borrows a contingency. This LTE/Wi-Fi shared diversity antenna is mainly for the 2.4GHz Wi-Fi band. It works with the Wi-Fi main antenna to achieve all the above 2x2 Wi-Fi functions.
Starting a part-time job does not mean that its main work can't be done well. The LTE network frequency band that the shared diversity antenna faces is concentrated in the middle and high range. The electromagnetic wave wavelength in this frequency band is short and the diffraction ability is poor, which is commonly known as the weak wall penetration ability. In indoors and other environments, the environment is basically inactive. In Qualcomm's plan, when this type of LTE connection is invalid, this shared diversity antenna will be used as a Wi-Fi antenna, which means that this solution actually has LTE network connection performance. The impact can be said to be minimal.
The above is our analysis based on theory and data, and the actual situation is basically the same as our analysis.
It can be seen that in the same network environment and home layout, ordinary single-channel Wi-Fi devices have already marked red spots in some corners, which means that in this area, devices have frequent Wi-Fi connections disconnected. Unusable, in contrast, devices using 2x2 Wi-Fi can help families achieve perfect wireless coverage.
Qualcomm's dual-channel Wi-Fi as a benchmark function, even its own chip, only appears on the high-end products, except for the top Snapdragon 800 series SoC, the most familiar one is the generation of God U The Snapdragon 660 and the new debut 骁 710 710, the Snapdragon 710 as a brand new series, there are many high-end exclusive features, including the Snapdragon 845 with the Hexagon 685 DSP and the new Spectra 250 ISP and what we call two-way Wi-Fi today.
Therefore, we selected Xiaolong 8 SE equipped with Xiaolong 710 processor for simple testing. On the other hand, we also selected an Android tablet that does not support dual-channel Wi-Fi. The tablet is selected as the comparison object, mainly because it is designed in the antenna. The space is more plentiful and can be used as a representative of the excellent 1x1 Wi-Fi solution.
The above is the data measured in the room farthest from the router. Both devices are connected to 'XXX_5G_601'. The 5GHz band is chosen because it is weaker in wall penetration and can increase the test difficulty. Because it is measured in the home environment, You can see the network interference around the neighbors.
The smaller screen on the left is the Xiaomi 8 SE, the test Wi-Fi is displayed as a green line (the lower part is the green shaded area), and the right side is the Android tablet. The test Wi-Fi is displayed as a blue line (the lower part is the blue shaded area). Looking at the enlarged legend, we can see that in the same environment, when the signal intensity of Xiaomi 8 SE is about -74dBm, the signal of the flat panel is basically around -81dBm, and the signal strength of the two has obvious difference, and the fluctuation occurs later. Among them, this difference always exists, and it can be judged that the Wi-Fi connection capability of the Xiaomi 8 SE is stronger than that of the larger one.
Qualcomm's dual-channel Wi-Fi technology not only improves the network experience itself, but also reduces the design difficulty of mobile phone manufacturers. It does not need to leave more than one Wi-Fi antenna in the precious interior space in the early design. As long as you use mid- to high-end Qualcomm SoCs, you will naturally have better 2x2 Wi-Fi technology. For consumers, this is also good news, which directly shows that if you want to have a better network experience, In addition to broadband and routers to be strong enough, choosing a 'Qualcomm core' phone that supports 2x2 Wi-Fi is also a worthwhile option.
Wireless network is now the new need of everyone, its importance is self-evident, and the most common user contact is the operator mobile network and Wi-Fi now around us. Needless to say, LTE network, control point It is based on the network provided by the operator, the coverage of the base station and the uplink and downlink capabilities of the mobile phone baseband. Among them, except for the mobile phone, it is basically an uncontrollable factor.
In contrast, in the real wireless network experience, the importance of Wi-Fi will actually be higher. First of all, one of the most practical, tariff issues, compared to the use of mobile networks need to pay attention to the remaining traffic, certainly still Wi-Fi can be used more openly. After all, even if the so-called unlimited traffic package, after using a certain amount, there will be different speed limit measures, and the network experience will be greatly reduced.
To improve the Wi-Fi experience, I believe many of my friends have some understandings. We can easily divide them into three links, namely, network bandwidth, routers and other wireless output devices and mobile terminals and other terminal receiving devices. The bandwidth is the easiest. Understand that if you want to be fast, you will have to access a high-speed and large-bandwidth network. Under the circumstance of sufficient conditions, the network speed of 100M fiber must be faster than 4M small water pipe.
The selection of routers, stability, maximum bandwidth support, load capacity, dual-band 2.5GHz and 5GHz, multi-antenna MIMO technology, etc. are all considered. Of course, the routing is also doing well, and the general purchase is reliable. Brand, the right price will not make a big mistake.
But maybe you will still find that even if the network above your home is good enough, 100 Mbps fiber to the home, high-end router configuration is complete, you still can not enjoy the ideal wireless network experience of your own ideal, not only often inexplicable Delay, in some corners with more obstacles or distant distances, even the basic stability of the connected network is difficult to guarantee, Wi-Fi is always disconnected and reconnected, and there are still thoughts to brush or eat chicken.
If all of these situations occur when you are using your mobile phone, then no doubt, most of your mobile phones do not support 2x2 dual-channel Wi-Fi technology.
2x2 Wi-Fi is a new feature supported by Qualcomm's mid- to high-end SoC. With dual-antenna MIMO (Multiple Input Multiple Output) technology, existing resources can be better utilized without increasing spectrum resources and antenna transmit power. In the case of better network coverage and higher data throughput, the network signal is better and the network speed is faster (requires that the router wireless network transmitter also supports MIMO technology).
'Wired resources are unlimited, but wireless resources are limited'. Wired networks have great advantages in this respect. When there is a need for extension, more fiber can be solved, and one can not do more. However, wireless networks rely on the 'aviation route' of invisible electromagnetic waves. Therefore, there are mutual interference problems. The spectrum resources themselves are limited. They also need to consider the attenuation of the propagation process and the different electromagnetic wave diffraction abilities of each frequency band. The limit is even greater.
In order to make use of valuable spectrum resources, there are technologies such as high-order modulation, multi-antenna MIMO and multi-carrier modulation. The two-channel Wi-Fi we talked about today mainly uses the characteristics of dual-antenna MIMO for us. The commonly used smartphone Wi-Fi capability has brought huge improvements.
MIMO involves both spatial diversity and spatial multiplexing. With spatial diversity technology, the transmitter can send the same signal from different antennas. After receiving multiple signals at the receiving end, the multiple antennas can mutually verify each other, thus obtaining greater diversity gain. Improve the reliability of the signal. In areas where the signal coverage is weak, you can use this feature to ensure high reliability of the connection. Naturally, it has a better experience than single-channel Wi-Fi. Of course, 'mutual verification' is just convenient. A simple statement of understanding, the reality is that multiple antennas can use the more complex composite coding form to achieve greater enhancements, such as space-time block code and beamforming techniques, so we don't have to go into it.
The spatial multiplexing technology is the opposite. The multiple antennas at the output end respectively transmit different signals, and the multiple antennas corresponding to the receiving end are separately received, thereby achieving a multiplication of the channel capacity. The advantage lies in the transmission of the bandwidth itself and the antenna. The power requirements have not improved, mainly to increase the utilization of the spectrum. The simple metaphor is like the construction of two lanes or even multiple lanes between the two places, the efficiency of transmission is naturally raised. Similarly, here is only Conveniently understood, the actual situation also involves the establishment of the channel model, the complexity of the mediation and other details, but these are the problems that manufacturers and Qualcomm need to solve, let us enjoy the actual results.
Because of the support of spatial diversity gain and spatial multiplexing gain, dual-channel Wi-Fi can use 2x2 antennas to achieve parallel data transmission and channel fading suppression. In terms of actual experience, there is no wireless network coverage at home. Less dead angles, and Wi-Fi delay, packet loss rate, uplink and downlink rates, etc. will also be more ideal.
Maybe some students will ask, I also know that 2x2 Wi-Fi can significantly improve the network experience, but let me add another antenna design for Wi-Fi in the internal space of the mobile phone. It is really a courtesy. Can't do it.
Yes, first of all, this antenna may reduce the capacity of the battery by a few more points. Students who are sensitive to battery life may not be very good at the time. Secondly, the antenna design itself is a technical activity, and the antenna clearance is TRP (Total Radiated). The impact of Power, the overall transmit power) is on the head of the manufacturer. If the field test fails, the carrier's standard can not be met, and naturally there is no possibility of mass production.
And this is another big problem solved by Qualcomm's 2x2 Wi-Fi solution - the performance of dual-channel Wi-Fi can be achieved with a single Wi-Fi antenna. Of course, Qualcomm is not doing nothing but a different way. The LTE antenna next door borrows a contingency. This LTE/Wi-Fi shared diversity antenna is mainly for the 2.4GHz Wi-Fi band. It works with the Wi-Fi main antenna to achieve all the above 2x2 Wi-Fi functions.
Starting a part-time job does not mean that its main work can't be done well. The LTE network frequency band that the shared diversity antenna faces is concentrated in the middle and high range. The electromagnetic wave wavelength in this frequency band is short and the diffraction ability is poor, which is commonly known as the weak wall penetration ability. In indoors and other environments, the environment is basically inactive. In Qualcomm's plan, when this type of LTE connection is invalid, this shared diversity antenna will be used as a Wi-Fi antenna, which means that this solution actually has LTE network connection performance. The impact can be said to be minimal.
The above is our analysis based on theory and data, and the actual situation is basically the same as our analysis.
It can be seen that in the same network environment and home layout, ordinary single-channel Wi-Fi devices have already marked red spots in some corners, which means that in this area, devices have frequent Wi-Fi connections disconnected. Unusable, in contrast, devices using 2x2 Wi-Fi can help families achieve perfect wireless coverage.
Qualcomm's dual-channel Wi-Fi as a benchmark function, even its own chip, only appears on the high-end products, except for the top Snapdragon 800 series SoC, the most familiar one is the generation of God U The Snapdragon 660 and the new debut 骁 710 710, the Snapdragon 710 as a brand new series, there are many high-end exclusive features, including the Snapdragon 845 with the Hexagon 685 DSP and the new Spectra 250 ISP and what we call two-way Wi-Fi today.
Therefore, we selected Xiaolong 8 SE equipped with Xiaolong 710 processor for simple testing. On the other hand, we also selected an Android tablet that does not support dual-channel Wi-Fi. The tablet is selected as the comparison object, mainly because it is designed in the antenna. The space is more plentiful and can be used as a representative of the excellent 1x1 Wi-Fi solution.
The above is the data measured in the room farthest from the router. Both devices are connected to 'XXX_5G_601'. The 5GHz band is chosen because it is weaker in wall penetration and can increase the test difficulty. Because it is measured in the home environment, You can see the network interference around the neighbors.
The smaller screen on the left is the Xiaomi 8 SE, the test Wi-Fi is displayed as a green line (the lower part is the green shaded area), and the right side is the Android tablet. The test Wi-Fi is displayed as a blue line (the lower part is the blue shaded area). Looking at the enlarged legend, we can see that in the same environment, when the signal intensity of Xiaomi 8 SE is about -74dBm, the signal of the flat panel is basically around -81dBm, and the signal strength of the two has obvious difference, and the fluctuation occurs later. Among them, this difference always exists, and it can be judged that the Wi-Fi connection capability of Xiaomi 8 SE is stronger than that of a larger tablet.
Qualcomm's dual-channel Wi-Fi technology not only improves the network experience itself, but also reduces the design difficulty of mobile phone manufacturers. It does not need to leave more than one Wi-Fi antenna in the precious interior space in the early design. As long as you use mid- to high-end Qualcomm SoCs, you will naturally have better 2x2 Wi-Fi technology. For consumers, this is also good news, which directly shows that if you want to have a better network experience, In addition to broadband and routers to be strong enough, choosing a 'Qualcomm core' phone that supports 2x2 Wi-Fi is also a worthwhile option.
