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Signal processing method and device in CDMA radio communication system

A technology of wireless communication system and signal processing device, applied in the direction of diversity/multi-antenna system, code division multiplexing system, radio transmission system, etc.

Inactive Publication Date: 2003-01-15
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] However, there is a big difference between doing only temporal processing versus doing both temporal and spatial processing

Method used

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  • Signal processing method and device in CDMA radio communication system
  • Signal processing method and device in CDMA radio communication system
  • Signal processing method and device in CDMA radio communication system

Examples

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no. 2 example

[0097] In the case where the weight vector calculation unit 305 uses a beamforming algorithm, by analyzing the useful signal component and the interference signal component in the DPCCH signal, the signal vector with only the useful signal component can be obtained v A signal vector with only interfering signal components present u The autocorrelation matrix of .

[0098] Since the useful signal component has been despread by the code of the useful signal in the despread DPCCH signal, the useful signal component can be obtained by processing the despread signal with the corresponding code and summing the processed signals in one gain period .

[0099] Similarly, by subtracting the estimated value of the useful signal component from the signal before despreading, the component of the interference signal source can be obtained.

[0100] If the autocorrelation matrix is ​​obtained by estimating the useful signal component vector and the interference signal component vector, the...

no. 3 example

[0104] FIG. 6 shows a structure for executing a signal processing procedure according to a third embodiment of the present invention.

[0105] Referring to Fig. 6, according to the present invention, when generating a beam, only the autocorrelation matrix of the existing signal component is used to despread the DPCCH signal vector y acquired.

[0106] The weight vector is then calculated using the matrix expression shown in Equation 4 below.

[0107] [Formula 4] R ‾ ‾ yy w ‾ = λ w ‾

[0108] As mentioned above, assuming that in the case of DPCCH, SF is fixed to a maximum value of 256, and assuming that the acquisition of weight vectors and performing beamforming without estimating interfering signal components cause no problems, under these assumptions, only It is possible to use ...

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Abstract

Disclosed is a method and apparatus for processing signals in a CDMA system using an adaptive antenna array. In a CDMA radio communication system which transmits / receives signals through a plurality of antennas, and can not synchronize with the other systems, the transmission and the receiving of the signals are carried out by using first channels having a constant spreading code and at least a second channel having a variable spreading code. The weighted value is updated by the despreading signals and / or the non-despreading signals of the received signals in the first channel, and the weighted value after being updated is applied onto the second channel.

Description

[0001] This application claims priority benefit from Korean Application No. P01-0031597 filed Jun. 7, 2001, which is incorporated herein by reference. field of invention [0002] The invention relates to a signal processing method and device in a Code Division Multiple Access (CDMA) wireless communication system equipped with an adaptive antenna array. technical background [0003] Typically, when implementing an adaptive antenna array for spatial and temporal processing in a CDMA system, a downconverter for converting UHF signals to baseband signals and an analog-to-digital (A / D) converter for converting analog signals to digital signals are required A converter, a beamformer for spatial processing, a Rake receiver for performing despreading and temporal processing for CDMA systems, and a digital demodulator for demodulating digitally modulated signals. [0004] Figure 1 shows the structure of a traditional Rake receiver used only to perform time processing in a CDMA system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/02H04B1/707H04B7/08
CPCH04B7/0842H04B7/0891H04B7/02
Inventor 沈东熙
Owner LG ELECTRONICS INC