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Information channel evaluating method, basic training sequence code detecting method and receiving terminal

A technology of training sequence code and channel estimation, which is applied in the field of signal reception, can solve the problems of performance deterioration of receiving terminal and channel estimation performance, etc.

Active Publication Date: 2013-08-21
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Abstract
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Problems solved by technology

[0015] However, the inventors of the present invention found that using figure 1 In the method shown, when the interference of the same-frequency cell is serious, the performance of channel estimation will deteriorate, which will lead to the deterioration of the performance of the receiving terminal

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  • Information channel evaluating method, basic training sequence code detecting method and receiving terminal
  • Information channel evaluating method, basic training sequence code detecting method and receiving terminal
  • Information channel evaluating method, basic training sequence code detecting method and receiving terminal

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Embodiment Construction

[0048] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0049] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

[0050] The first embodiment of the present invention relates to a channel estimation method, the specific process is as follows figure 2 shown.

[0051] In step 201, according to the synchronization information in the received data, the Middleamble data of 128Chips is used for channel estimation, and it is set as RxMidamb(j), j=0,1,2...127, RxMi...

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Abstract

The invention relates to the field of communication, disclosing an information channel evaluating method, a basic training sequence code detecting method and a receiving terminal. The method comprises the following steps of: conjugating with the FreqLocData (i, j) and performing the dot product after offsetting the interference signal of RxMidamb (j) and converting the time frequency domain in each iterating process for evaluating the information channel, wherein the FreqLocData (i, j) is the data that the Middleamble of each co-channel cell is converted to a frequency domain; converting the dot product-performed data FreqH(i, j) into a time frequency signal to denoise; computing the CheOut (i, j) of this iteration according to the denoised signal TimeHCaINoise (i, j) and an information channel evaluating result CheOut (i, j) computed by the last iterating process; and deciding whether to output the result or enter into the next iterating process according to the iterating times. Therefore, the invention can effectively improve the receiving performance of the receiving terminal when the same frequency interference is more serious.

Description

technical field [0001] The invention relates to the communication field, in particular to the signal receiving technology in the communication field. Background technique [0002] Time Division Synchronous Code Division Multiple Access SCDMA (TD-SCDMA for short), as the third generation mobile communication system standard proposed by China, combines time division duplex, code division multiple access, joint detection, smart antenna , Relay handover and a series of high-tech, with the characteristics of high spectrum utilization, low development cost, adaptable to asymmetric transmission, etc., has broad application prospects. In the TD-SCDMA system, a 144Chip middleamble is included in the middle of each time slot, which is used for the receiving terminal to perform channel estimation or Basic Middleamble (basic middleamble) detection. The receiving terminal can demodulate the data on the time slot only after performing channel estimation. The transmission and reception te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L25/03H04B17/00
Inventor 沈旭强张惠锁磊刘文明
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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