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Bell idles transmitting diversity channel receiving demodulation method

A technology of transmit diversity and channel reception, applied in space transmit diversity, diversity/multi-antenna systems, electrical components, etc., can solve problems such as the demodulation method of empty code transmit diversity reception that has not been seen, and reduce interference and multiple access interference , Improve link performance, easy to realize the effect of software and hardware

Inactive Publication Date: 2010-02-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the current prior art, there is no receiving demodulation method for empty code transmit diversity

Method used

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  • Bell idles transmitting diversity channel receiving demodulation method
  • Bell idles transmitting diversity channel receiving demodulation method
  • Bell idles transmitting diversity channel receiving demodulation method

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Experimental program
Comparison scheme
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Embodiment Construction

[0028] image 3 It is a flowchart of the present invention, and its main content has been introduced in the summary of the invention. Combined with the characteristics of transmit diversity, the process of receiving demodulation will be introduced in detail below.

[0029] First, after separating the data and training sequences, channel estimation is performed.

[0030] The received training sequence can be expressed as

[0031] e=Gh+n

[0032] Among them, the G matrix is ​​a circular right-shift matrix composed of a basic Midamble code, h is the user's channel impulse response, and n is Gaussian white noise.

[0033] The maximum likelihood estimation of the channel impulse response h is completed by the following formula which is

[0034] h ^ ( G * T G ) - ...

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Abstract

A method for receiving-demodulating idle code emission subset includes obtaining channel impulse response of subset antenna by carrying out channel estimation after data and train sequence is separated, carrying out convolution of channel impulse response on antenna separately with each own spread spectrum code to form transmission matrix, demodulating received data and unitedly solving out emission data of base station.

Description

Technical field: [0001] The invention relates to the reception demodulation of empty code transmission diversity channel in mobile communication system, in particular to a reception demodulation of beacon channel signal used in code division multiple access (CDMA) system transmission diversity technology. Background technique: [0002] Diversity technology is widely used in wireless mobile communications to reduce the impact of multipath fading. Diversity technology can be divided into three categories: time diversity, frequency diversity and space diversity. Compared with time diversity and frequency diversity, space diversity technology can improve transmission reliability without increasing transmission power or sacrificing communication bandwidth, which is very attractive and has become a current research hotspot. [0003] Space diversity is to use space-separated antennas to obtain the transmission and reception of mutually independent fading signals, improve the system...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08H04B1/707
Inventor 李萍刘斌
Owner ZTE CORP
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