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A partially parallel interference cancellation method

A technology of interference cancellation and recursive method, which is applied in the communication between multiple stations, telephone communication, electrical components, etc., and can solve the problems of high computational load and heavy burden

Inactive Publication Date: 2006-06-28
BENQ CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0036] The aforementioned traditional PPIC needs to repeat the work of spreading and despreading, so it requires a very high amount of calculation
In particular, the signal changes at any time. For a mobile station (MS) or a base station (BS), it is a heavy burden to repeat the same and complicated actions.

Method used

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Embodiment Construction

[0112] In order to enable the examiner to have a further understanding of the features, purpose and functions of the present invention, a detailed description is provided with the accompanying drawings:

[0113] The traditional PPIC mentioned above needs to repeat the work of spreading and despreading, so it requires a very high amount of calculation. The following continues to derive the formula for exempting this calculation requirement:

[0114] Z k , i ( s ) = 1 T ∫ T + τ k ( i + 1 ) T + τ k ...

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Abstract

The invention relates to a method of partial parallel interference cancellation. It uses the recursion method to successively smooth down the multiple access disturbances for the receiving signal. The invention uses recursion method to transform the output of the back step into input of current step. So, only one arithmetic circuit is needed to smooth over the disturbance.

Description

technical field [0001] The present invention relates to a method for eliminating multiple access interference (MAI), especially a simplified method for using partial parallel interference cancellation (Partial Parallel Interference Cancellation, PPIC). Background technique [0002] With the advancement of wireless communication technology, mobile phones have realized the desire of human beings for wireless communication, getting rid of the shackles of traditional wired phones, not only allowing users more freedom, but also bringing people closer to each other. [0003] In the future third generation mobile communication system, code division multiple access (Code Division Multiple Access, CDMA) plays an important role. However, this type of spread spectrum communication technology suffers from severe multiple access interference (MAI), which will be briefly described below. [0004] Assuming that there are K users (User) in the system, each user transmits a set of binary da...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/20H04B7/26H04B1/69H04M15/00
Inventor 陈逸民王旭庆陈纯政郭富彦
Owner BENQ CORP
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