Perfect binary sequence pair-based channel estimation and equalization method and system

A technology for binary sequence pairing and channel estimation, which is applied in baseband system components, shaping networks in transmitters/receivers, etc., and can solve problems such as inability to meet channel estimation.

Inactive Publication Date: 2013-06-12
ZHEJIANG WANLI UNIV
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Problems solved by technology

Based on the study of unmatched filter sequences, Xu et al. proposed a class of binary sequence pairs with binary periodic autocorrelation properties (C.Q.Xu, K.Liu, G.Li, and W.B.Yu, Binary Sequence Pairs With Two -level Autocorrelation Functions, International Conference on Wireless Communications, Networking and Mobile Computing, pp.1361-1364, 2007.), and gave several different cycle BSPT construction methods, but due to the sequence disclosed in these documents There are many defects in channel estimation that cannot meet the requirements of channel estimation

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  • Perfect binary sequence pair-based channel estimation and equalization method and system
  • Perfect binary sequence pair-based channel estimation and equalization method and system
  • Perfect binary sequence pair-based channel estimation and equalization method and system

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Embodiment Construction

[0087] In order to make the above objects, features and advantages of the present application more obvious and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0088] The related solutions provided in the following embodiments of the present invention use the following definitions.

[0089] Definition 1: Let (a,b) be a binary sequence pair with length N, where a=(a 0 ,a 1 ,...,a N-1 ), b=(b 0 ,b 1 ,...,b N-1 ), then its periodic autocorrelation function (Periodic Autocorrelation Function) is:

[0090] R ( a , b ) ( τ ) = Σ i = 0 N - 1 a ...

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Abstract

The invention provides a channel estimation and equalization method and a channel estimation and equalization system. The method comprises the following steps of: 101, constructing a perfect binary sequence pair, namely constructing a difference set pair on a residue class additive group, and constructing characteristic sequences a and b of the difference set pair to form a sequence pair (a, b), wherein the sequence pair (a, b) is the perfect binary sequence pair; 102, at a transmitting end, performing periodic extension on the sequence a in the constructed sequence pair to obtain an implicit pilot sequence, and directly superposing the implicit pilot sequence onto data information for transmission; and 103, at a receiving end, performing mutual correlation by adopting the sequence b in the sequence pair and a received signal to finish channel estimation. The period of the constructed perfect binary sequence pair is consistent with the power of 2, and can be applied to the channel estimation, system synchronization and the like of an orthogonal frequency division multiplexing (OFDM) communication system, and a periodic auto-correction function has an impulse characteristic.

Description

technical field [0001] The invention belongs to the field of optimal signal design of communication systems, and in particular relates to a signal whose cycle is N=2 n , the optimal binary sequence pair with ideal impulse characteristics of periodic autocorrelation function, which can be used in application scenarios such as channel estimation and system synchronization of communication systems. Background technique [0002] Optimal signals are widely used in communication systems, especially in recent years with the continuous development of computer technology and the continuous improvement of hardware performance, the optimal discrete signal design theory and engineering applications have been developed rapidly, only complementary sequence sets This kind of optimal discrete signal has been better applied in many fields such as synchronization (Chinese patent CN101155021, CN101523745), channel estimation (Chinese patent CN102007742A, CN101626360), radar (Chinese patent CN1...

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Application Information

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IPC IPC(8): H04L25/02H04L25/03
Inventor施炯金丽萍尹湘源
OwnerZHEJIANG WANLI UNIV