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Method for estimating channel bit error rate

A technology for estimating channel and bit error rate, which is applied in the field of estimating channel bit error rate and channel quality estimation to achieve the effect of accurate calculation, simple calculation, and avoidance of complexity and inaccuracy

Active Publication Date: 2011-07-13
ZTE CORP
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The downside with this approach is that you still need to recode

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  • Method for estimating channel bit error rate
  • Method for estimating channel bit error rate
  • Method for estimating channel bit error rate

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Embodiment Construction

[0039] The technical solution of the present invention will be described in more detail below with reference to the drawings and embodiments.

[0040] The present invention is based on the idea that there is a certain inverse relationship between soft information and bit error rate, and obtains bit error rate by calculating the variance of soft information, and proposes a corresponding relation formula between soft information and bit error rate.

[0041] Such as figure 1 As shown, the GSM / EDGE system adopts convolution coding, and the receiving end correspondingly uses soft-decision Viterbi decoding to decode. Therefore, the receiver in the GSM / EDGE system first receives the baseband data by frame, and selects the corresponding demodulation method to perform soft demodulation on the received baseband data according to the different modulation methods. After obtaining the soft information, it calculates the average value:

[0042] a ‾ ...

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Abstract

A method for estimating the communication channel bit error rate is applied in a radio communication system and comprises following steps: demodulating baseband data which is received by a receiving end through the receiving end, then, obtaining soft information which is corresponded with each information bit, calculating variance of all soft information, and obtaining the bit error rate according to corresponding relation between the variance and the bit error rate. The method of invention utilizes the variance of soft demodulating information to estimate the communication channel bit error rate, the complexity and the inaccuracy of methods such as recoding and the like are avoided, the method has the characteristics of simple calculation and accurate calculation, and the method can be widely applied in various communication fields which need estimating the communication channel bit error rate.

Description

technical field [0001] The invention relates to channel quality estimation technology in the field of wireless communication, in particular to a method for estimating channel bit error rate. Background technique [0002] During the transmission of electromagnetic waves in the wireless communication channel, due to the complexity of the channel, phenomena such as multipath superposition, noise interference, co-channel interference, and Doppler frequency deviation will inevitably occur, resulting in the deterioration of the signal received by the receiving end, thus The decoded information is not exactly the same as the transmitted information, but there is a certain percentage of bit errors. Therefore, the bit error rate (BIT ERROR RATIO, BER) can be used to measure the channel quality. [0003] In the field of communication, it is often necessary to measure the channel quality in real time. For example, in the GSM (Pan-European Digital Cellular Mobile Communication System) / ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04B17/00H04B17/309
Inventor 朱彤
Owner ZTE CORP