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An Anti-Multipath Interference Method Based on Complete Complementary Sequence

A completely complementary sequence, multipath interference technology, applied in the field of wireless communication

Active Publication Date: 2019-09-03
COMMUNICATION UNIVERSITY OF CHINA
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Problems solved by technology

However, these designs are only suitable for slow fading and flat fading channel conditions

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  • An Anti-Multipath Interference Method Based on Complete Complementary Sequence
  • An Anti-Multipath Interference Method Based on Complete Complementary Sequence
  • An Anti-Multipath Interference Method Based on Complete Complementary Sequence

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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0043] The perfect orthogonality property for perfectly complementary sequences is stated as follows: the autocorrelation function must be zero for all shifts except zero, and the cross-correlation function must also be zero for all possible shifts. Suppose {A n ,B n} consists of N pairs of L-length heterogeneous fully complementary sequences. and if {A n ,B n} satisfy the following correlation function definition, then they can be regarded as complete complementary sequences:

[0044] (i) For all i=1,2...,N,

[0045]

[0046] (ii) For all 1≤i, j≤N, i≠j,

[0047]

[0048] Formulas (1) and (2) respectively represent the autocorrelation function and cross-correlation function expression of the complete complementary sequence; where, and describe the A i and B i The circular autocorrelation function of...

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Abstract

The invention discloses a multipath interference resisting method. A complete complementary sequence spread-spectrum technology is adopted to design a user baseband signal for transmission. The complete complementary sequence is built through changing the original complementary sequence pair, and even in the case of asynchrony, the orthogonality of the complete complementary sequence can be kept. The perfect orthogonality can resist multipath fading in an MIMO system. The method by adopting the technical scheme of the invention has better performance than the traditional spread spectrum code spread spectrum mode.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a method for resisting multipath interference based on a complete complementary sequence. Background technique [0002] MIMO technology has become a vital part of wireless broadcasting networks, and space-time coding is also widely used in communication systems to improve performance and communication stability. The MIMO system greatly increases the transmission rate of the system through space division multiplexing, thereby improving the system performance. Among many space-time coding design schemes, space-time block codes and space-time trellis codes are considered to be the mainstream technical implementation methods. In order to improve the performance of space-time coding, researchers have made great efforts to further research, such as space-time complementary coding using paired complementary codes. [0003] Most of the existing traditional sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04B1/69H04B1/707H04B1/7103
Inventor 李树锋张宇驰金立标
Owner COMMUNICATION UNIVERSITY OF CHINA
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