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IQ imbalance compensation method based on Golay complementary sequences

A complementary sequence, balanced compensation technology, applied in baseband system components, shaping networks in transmitter/receiver, multi-frequency code systems, etc., can solve the problem of insufficiently exploiting the autocorrelation and co-correlation characteristics of training sequences.

Inactive Publication Date: 2014-02-12
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

At present, a large number of IQ imbalance compensation algorithms are estimated and compensated based on traditional LS and other criteria, but do not fully exploit the autocorrelation and cocorrelation characteristics of the training sequence, and assume that the ideal channel state information (CSI, Channel State Information) is premise

Method used

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  • IQ imbalance compensation method based on Golay complementary sequences
  • IQ imbalance compensation method based on Golay complementary sequences
  • IQ imbalance compensation method based on Golay complementary sequences

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Embodiment Construction

[0052] Concrete method steps of the present invention will be introduced in detail below in conjunction with accompanying drawing:

[0053] figure 1 It is a structure diagram of data sent by the physical layer of the sending end in the present invention. A training sequence (TS) is inserted in the time domain transmission data, and the training sequence is sent before the transmission data. The UW is inserted between the sent data to form the CP of the equivalent data block. The UW used in this example is a Golay sequence, and the length of the UW extended data block is N b =512, data block CP length N cp =64, at this time P=8. The TS consists of 8 Uwas and 1 Uwa as a cyclic prefix, 8 Uwbs and a Uwb as a cyclic prefix, that is, the TS consists of 8+1 UWa and 8+1 UWb. Let send user data as: N s is the user data length. Length N inserted between user data cp The UW is: u=[u(0),u(1),...,u(N cp -1)] Τ . The i-th data block after UW expansion Send after single carrie...

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Abstract

The invention belongs to the technical field of wireless communication and particularly relates to an IQ imbalance compensation method based on the Golay complementary sequences, wherein the IQ imbalance compensation method is applied to a wireless communication system which is disturbed by IQ imbalance. The IQ imbalance compensation method based on the Golay complementary sequences comprises the steps that S1 a training sequence pair is established and sent; S2 a receiving terminal receives the training sequence pair established in the step S1 and conducts circular correlation processing on each training sequence which is received; S3 the influence of the IQ imbalance of a received signal is compensated. According to the IQ imbalance compensation method based on the Golay complementary sequence, under the condition that channel information does not need to be known, complex parameters of IQ imbalance are estimated and then IQ imbalance is compensated.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an IQ imbalance compensation method based on a Golay complementary sequence in a wireless communication system interfered by in-phase quadrature (IQ, In-phase Quadrature) two-way imbalance. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) technology is widely accepted by broadband communication due to its parallel transmission, which makes the signal bandwidth smaller than the coherent bandwidth of the channel, effectively combats multipath, and has low equalization complexity at the receiving end. Single Carrier Modulation with Frequency Domain Equalization (SC-FDE, Single Carrier Modulation with Frequency Domain Equalization), like OFDM, greatly reduces the equalization complexity of received data through frequency selective channels at the receiving end, and is one of the techn...

Claims

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Application Information

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IPC IPC(8): H04L25/03H04L27/26
Inventor 艾赳赳刘静蕾王田成先涛岳光荣李少谦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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