Receiver and method for ID-SCDMA system

A TD-SCDMA and receiving device technology, applied in the field of wireless communication, can solve the problems of increased computational complexity and high complexity, and achieve the effect of improving receiving performance

Inactive Publication Date: 2009-05-06
ST ERICSSON SEMICON BEIJING
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  • Abstract
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Problems solved by technology

Although the Viterbi algorithm greatly simplifies MLSE and makes MLSE a practical method, its computational complexity still increases exponentially with the increase of the inter-symbol interference extension length
Therefore, for channels with long channel impulse response (CIR) extension and few main tap coefficients, the Viterbi algorithm is still a method with large complexity and difficult to be practically applied.

Method used

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  • Receiver and method for ID-SCDMA system
  • Receiver and method for ID-SCDMA system
  • Receiver and method for ID-SCDMA system

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Embodiment Construction

[0012] Next, the construction of the MLSE receiver 3 using the MVA algorithm will be described. Such as image 3 As shown, the receiver 3 according to the present invention includes a data separator 31 , a channel estimator 32 , a DIR estimator 33 , MVA execution means 34 , a descrambler 35 and a demodulator 36 . After data separator 31 receives the data of a timeslot every time, according to figure 2 The separation method shown divides the data of one slot into the data R data and the training sequence (Midamble) R Midamble Two parts, where R data partly includes figure 2 The first 368 symbols and the last 368 symbols shown, R Midamble A section refers to a midamble sequence of length 144 symbols. training sequence part R Midamble In the input channel estimator 32, be used for the estimation of channel impulse response (CIR), the output of channel estimation Estimation of the DIR is further performed as an input to the estimation of the DIR. Then the output q(n) o...

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Abstract

This invention provides a receiving device used in the TD-S CDMA system and its method. The device includes a data separator dividing the received data into a Midamble part and a data part, a channel calculation unit carrying out a channel impulse response calculation based on local Midamble and that separated by the data separator, a DIR calculation unit for selecting the limited several non-zero tapped ideal impulse responses, a MVA executing device executing the largest likelihood sequence calculation by the MVA algorithm, unit to de-interfere and demodulate the result output by the MVA.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a receiving method and device for realizing high-quality reception in the high-speed data transmission service of the third-generation mobile communication system TD-SCDMA (Time Division Synchronous Code Division Multiple Access System). Background technique [0002] With the increasing demand for high-speed data transmission in future multimedia services, wireless data services will increase sharply, which requires that the third-generation mobile communication system must have some characteristics suitable for transmitting data services, such as high data volume, high burst, high reliability etc. For the TD-SCDMA system, one of the third-generation mobile communication standards, in order to meet the needs of various users with different communication requirements, the terminal receiver must not only support high-quality low-speed traditional voice services, but ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03
Inventor 张代君董霄剑王平平
Owner ST ERICSSON SEMICON BEIJING
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