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Low-power-consumption optimal-receiving method and system supporting IEEE802.11ac standard and IEEE802.11n standard

A receiving method and standard technology, applied in transmission system, power management, energy consumption reduction, etc., can solve problems affecting product life and reliability

Active Publication Date: 2015-05-20
ESPRESSIF SYST SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In chip design, the power consumption of the system will affect the life and reliability of the product

Method used

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  • Low-power-consumption optimal-receiving method and system supporting IEEE802.11ac standard and IEEE802.11n standard
  • Low-power-consumption optimal-receiving method and system supporting IEEE802.11ac standard and IEEE802.11n standard
  • Low-power-consumption optimal-receiving method and system supporting IEEE802.11ac standard and IEEE802.11n standard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] This embodiment takes the IEEE802.11n and IEEE802.11ac receiver 40MHz receiver mode as an example, and the implementation process of low power consumption is shown in image 3 . where f CH =40MHz, Δf=5MHz. Taking the main channel in the negative frequency band as an example (the judgment process of the main channel in the positive frequency band is the same as that of the main channel in the negative frequency band), image 3 The bandwidth and channel judgment and working state adjustment method in the method is to judge the power spectral density obtained after FFT of the received signal in the baseband processing, and the specific process is as follows:

[0054] 1) When in the [0, 25] frequency domain, only the [0, 5] MHz interval has no energy, then it is transmitted on the main channel, such as Figure 5 (1) Right picture, F BW =20MHz, continue to keep one way (I way or Q way) receiving module to receive data packets.

[0055] 2) When in the [0, 25] frequency d...

Embodiment 2

[0058] This embodiment takes IEEE802.11ac receiver 80MHz receiver mode as an example, and the low power consumption implementation process is shown in image 3 . where f CH =80MHz, Δf=5MHz. Taking the main channel in the negative frequency band as an example (the judgment process of the main channel in the positive frequency band is the same as that of the main channel in the negative frequency band), image 3 The bandwidth and channel judgment and working state adjustment method in the method is to judge the power spectral density obtained after FFT of the received signal in the baseband processing, and the specific process is as follows:

[0059] 1) When in the [0, 45] MHz frequency domain, only the [0, 25] MHz interval has no energy, then transmit on the main channel (20MHz main channel 2), such as Image 6 (1) Right figure, f BW =20MHz, i=2, continue to maintain one (I or Q) receiving module to receive data packets.

[0060] 2) When there is no energy in the [0, 45] M...

Embodiment 3

[0067] This embodiment takes IEEE802.11ac receiver 160MHz receiver mode as an example, and the low power consumption implementation process is shown in image 3 . where f CH =160MHz, Δf=5MHz. Taking the main channel in the negative frequency band as an example (the judgment process of the main channel in the positive frequency band is the same as that of the main channel in the negative frequency band), image 3 The bandwidth, channel and working state adjustment method in the method is to judge the power spectral density obtained after FFT of the received signal in the baseband processing, and the specific process is as follows:

[0068] 1) When there is no energy in [0, (20*(i-1)+5)]MHz and [(20*i+5), 85]MHz in the [0, 85]MHz frequency domain, then in the main channel (20MHz main channel i), such as Image 6 (1) Right figure, f BW =20MHz, the value of i is 4, 3, 2, 1, and continue to maintain one (I or Q) receiving module to receive data packets.

[0069] 2) When in th...

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Abstract

The invention discloses a low-power-consumption optimal-receiving method and system supporting the IEEE802.11ac standard and the IEEE802.11n standard, and belongs to the technical field of wireless communication. A local frequency flo is arranged on a radio-frequency head to carry out offset deltaf in the opposite direction of a main channel in a carrier frequency center, then, bandwidth judgment is carried out only according to transmission signals of one of an I path and a Q path in the process of baseband processing, whether a receiving module of the other of the I path and the Q path needs to be started to receive signals is determined according to the judgment result, reduction of the power is achieved, and the offset deltaf is smaller than the minimum bandwidth of the transmission signals on a channel. According to the low-power-consumption optimal-receiving method and system supporting the IEEE802.11ac standard and the IEEE802.11n standard, the local frequency flo carries out offset from the carrier frequency center in the opposite direction of the main channel, the receiving module of only one of the I path and the Q path is started to monitor signal transmission on the channel and to receive the transmission signals occupying a half or less of the bandwidth of the channel, and compared with a traditional method, a half of power consumption can be reduced under the optimal conditions.

Description

technical field [0001] The present invention relates to a method and device in the technical field of wireless communication, specifically to a low-power Wi-Fi optimized receiving method and system that can achieve up to 50% power consumption reduction and support IEEE802.11ac and IEEE802.11n standards . Background technique [0002] After more than ten years of development, Wi-Fi technology has expanded its application from personal computers to various handheld electronic devices: mobile phones, tablet computers, digital cameras, handheld game consoles, etc. Wi-Fi technology now includes IEEE802.11a, 11b, 11g, 11p, 11n, and 11ac, among which IEEE802.11n has a channel bandwidth of 40MHz, uses MIMO (multiple input-multiple output) technology, and has a maximum transmission rate of 600Mbps. With the higher requirements on the data transmission rate of the wireless LAN, the IEEE802.11ac standard, which can bring gigabit-level transmission speed, came into being. IEEE802.11ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/16H04W52/02
CPCY02D30/70
Inventor 程方芳林豪符运生
Owner ESPRESSIF SYST SHANGHAI