Association processing method for beam formation and rake reception in CDMA

A rake receiving and joint processing technology, applied in the direction of code division multiplexing system, diversity/multi-antenna system, space transmit diversity, etc., can solve the problem of high system complexity and achieve excellent performance and low bit error rate BER The effect of system complexity

Inactive Publication Date: 2006-07-12
PANASONIC CORP
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Problems solved by technology

[0006] Some literatures have studied the joint space-time processing problem of receiving antenna array and rake reception. In the system structure proposed in the literature [2] listed below, a multipath for each user is adopted. The scheme in the beamformer, this structure has the disadvantage of high system complexity

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  • Association processing method for beam formation and rake reception in CDMA
  • Association processing method for beam formation and rake reception in CDMA
  • Association processing method for beam formation and rake reception in CDMA

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Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that the described embodiments are for the purpose of illustration only, and do not limit the scope of the present invention. The present invention takes the CDMA system as an example, but it should be understood that the present invention is not limited thereto, and the present invention can be applied to any system using beamforming and rake receiving methods.

[0032] The structure of the BF-Rake receiver applied to the CDMA system proposed by the present invention is as follows: figure 1 shown. The BF-Rake receiver includes an array receiving antenna 100 , a radio frequency unit RX 102 , a beamformer 103 , a despreader 106 , multiple multipliers and a Rake receiver 107 . The beamformer 103 includes an adder 104 and a weight updating unit 105 .

[0033] Combine below figure 1 The operation of the BF-Rake receiver according to the embodiment ...

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Abstract

The invention relates to a combined treatment method for intelligent antenna and Rake receiver in CDMA system. Wherein, it uses only one beam former for all multipath signals of every user and LMS adaptive algorithm to update array element weight vector. This invention has better bit error rate than that with beam former for every signal and reduces complexity for system realization.

Description

technical field [0001] The invention relates to a joint processing method combining smart antenna and rake reception in a CDMA system. Background technique [0002] With the gradual integration of wireless network, multimedia technology and the Internet, people have higher and higher requirements for the type and quality of wireless communication services. In order to meet the requirements of wireless multimedia and high-speed data transmission, people proposed and developed the third generation mobile communication system (3G). In the 3G system, Code Division Multiple Access (CDMA) technology is adopted. However, the CDMA system is an interference-limited system, and reducing and eliminating the influence of factors such as co-channel interference (CCI), multipath fading, and near-far effect in the CDMA system has become a key issue to improve the capacity of the CDMA system. [0003] Generally, the BF-Rake receiving system adopts multiple beamformers 203-1~203-N, such as...

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Application Information

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IPC IPC(8): H04B7/08H01Q3/26H04J13/00H04B1/7115
Inventor 黎海涛李继峰
Owner PANASONIC CORP
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