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Method for checking multi aerial ranging code in WiMAX system

A multi-antenna, ranging code technology, applied in diversity/multi-antenna systems, through diversity reception to prevent/detect errors, etc., can solve problems such as low efficiency, reduce error detection rate, improve processing capacity, and save processing time Effect

Inactive Publication Date: 2011-07-20
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The complexity of this method is T times that of a single antenna when there are multiple antennas, and the efficiency is low

Method used

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  • Method for checking multi aerial ranging code in WiMAX system
  • Method for checking multi aerial ranging code in WiMAX system
  • Method for checking multi aerial ranging code in WiMAX system

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Embodiment Construction

[0030] First, the application system of the present invention is described:

[0031] Assuming that the number of subcarriers in one symbol of the wimax system is 1024, the ranging channel occupies the first six subchannels, and there are 144 ranging subcarriers in total.

[0032] In the second step, the method of the present invention is described in detail in conjunction with specific applications:

[0033] like image 3 As shown, the detection method of the present invention is applied to the above-mentioned wimax system, specifically comprising the following steps:

[0034] 301) Use the ranging subcarrier extraction module to extract the ranging subcarrier from the received data according to the position of the ranging subchannel: y 0 (k) ,y 1 (k) ,...,y 142 (k) ,y 143 (k) , k=0, 1..., antnum-1.

[0035] 302) Perform a conjugate difference operation on the extracted ranging subcarrier modules. In each antenna, adjacent subcarriers in a block TILE are conjugated a...

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Abstract

The invention relates to a multi-antenna ranging code detection method in a WiMAX system, including: obtaining a multi-antenna conjugate subcarrier on a frequency domain according to the received the multi-antenna data; merging and correlating with a local ranging code conjugate sequence; setting the detection threshold k1*Pnoise according to the noise power Pnoise and comparing with the maximum related power, if small, carrying out the further detection; setting the inter-code correlated threshold K2*Pnoise and comparing with all the related powers, if small, calculating the corresponding multi-antenna ranging code time-biased Tm=(Theta m / 2 Pi)*N, wherein: K1, K2 are constants, the Theta m is the phase angle of the related result of the multi-antenna conjugate subcarrier and the local ranging code conjugate sequence, m is the serial number of the local ranging code, and N is the number of the symbol subcarriers. The method can avoid the respectively relating of each antenna with the local sequence and save the processing time; at the same time, the simultaneously usage of two thresholds can more accurately detect the real ranging code.

Description

technical field [0001] The invention relates to a wimax system, in particular to a detection method for uplink multi-antenna ranging codes (ranging codes) of base stations of the wimax system. Background technique [0002] At present, the communication industry has introduced a brand-new broadband wireless access technology, which is named wimax. Wimax is the abbreviation of world interoperability for microwave accsee, translated as microwave access global interoperability. WiMAX is a standards-based technology that can replace existing cable and DSL connections to provide last-mile wireless broadband access. WiMAX will provide wireless broadband connectivity in fixed, mobile, portable and eventually mobile wireless broadband connections without the need for direct line-of-sight base stations. In typical 3- to 10-mile radius cell deployments, WiMAX Forum-certified systems are expected to deliver up to 40 Mbps per channel for fixed and portable access applications, supporti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/02H04L1/02
Inventor 刘浩许航郑新春郭阳
Owner ZTE CORP
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