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Method for checking multi aerial ranging code in WiMAX system

A multi-antenna and ranging code technology, applied in diversity/multi-antenna systems, preventing/detecting errors through diversity reception, etc., can solve problems such as low efficiency, reduce false detection rates, improve processing capabilities, and save processing time Effect

Inactive Publication Date: 2008-07-30
ZTE CORP
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  • 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] As shown in Figure 3, 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 and...

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Abstract

The invention relates to a multi-antenna ranging code detection method in a WiMAX system, including: a multi-antenna conjugate subcarrier on a frequency domain is obtained according to the received the multi-antenna data; the merging and the relating with a local ranging code conjugate sequence are carried out; the detection threshold k1*Pnoise is set according to the noise power Pnoise and is compared with the maximum related power, if small, the further detection is carried out; the inter-code correlated threshold K2*Pnoise is set and is compared with all the related powers, if small, the corresponding multi-antenna ranging code time-biased Tm which is equal to (Theta m / 2 Pi) multiplied by N is calculated, 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 Applications(China)
IPC IPC(8): H04B7/02H04L1/02
Inventor 刘浩许航郑新春郭阳
Owner ZTE CORP
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