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Millimeter waves indoor communication system capable of flexibly configuring guard interval

A technology of guard interval and indoor communication, applied in the field of communication systems, can solve the problems of increasing the data processing delay of a single-carrier communication system, and can not use channel estimation, etc., to reduce the data processing delay, improve communication performance, high transmission performance and The effect of transmission efficiency

Inactive Publication Date: 2015-08-12
黄锋
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Problems solved by technology

However, adopting a structure similar to that of OFDM modulated signals will increase the data processing delay at the transmitting end of the single-carrier communication system, and adding a data cyclic prefix cannot be used for channel estimation and other processing

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  • Millimeter waves indoor communication system capable of flexibly configuring guard interval
  • Millimeter waves indoor communication system capable of flexibly configuring guard interval

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] A typical millimeter wave wireless communication system transmitter such as figure 1 As shown, the present invention proposes to use a pseudo-random sequence to replace the data cyclic prefix of a single-carrier communication system, and the signal format is as follows figure 2 As shown, N+M=2^K in the figure, so that the FFT / IFFT of 2^K points can be used, wherein N, M, and K are all positive integers. The pseudo-random sequence can adopt Zero Correlation Zone sequence, M sequence, Golay sequence and the like. The pseudo-random sequences before and after the data blocks of N single carrier symbols are the same, so a cyclic prefix is ​​also formed, so that frequency domain channel estimation and equalization techniques can be used. Compared with the single-carrier system using the data cyclic prefix, the transmitter using this format can avoid buffering data ...

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Abstract

The invention discloses a millimeter waves (MMW) indoor communication system capable of flexibly configuring a guard interval and provides a novel data format modulated by a single carrier. A main principle is that a guard interval pseudorandom sequence substitutes for a data cyclic prefix of a conventional single carrier communication system. Compared with the single carrier communication system using the data cyclic prefix, the system using the data format may prevent a transmitting end from caching data blocks so as to reduce data processing time delay at the transmitting end. Further, the pseudorandom sequence is known data and has good correlation so as to be capable of being used for channel tracking estimation, clock error tracking estimation, and carrier error tracking estimation. In addition, guard interval pseudorandom sequences with different lengths are used for guaranteeing high transmission performance and transmission efficiency of the MMW communication system in different communication environments.

Description

technical field [0001] The present invention relates to a communication system, in particular to a millimeter wave indoor communication system. Background technique [0002] In the field of wireless communication, the frequency of millimeter wave is above 30GHz. Compared with the frequency band with lower frequency, the millimeter wave frequency band has abundant bandwidth resources. Therefore, the millimeter wave communication system can increase the data transmission rate of the communication system by expanding the bandwidth of the communication channel. . However, because of the high frequency of millimeter waves, when there is no line-of-sight transmission path in indoor transmission, the channel fading of the transmitted signal received by the system is relatively large. In this case, OFDM modulation can effectively compensate for channel fading. However, the peak-to-average energy ratio of the OFDM modulated signal is large, requiring the power of the transmitter pow...

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/2678H04L27/2628H04L27/2637H04L27/2695
Inventor 黄锋李焱
Owner 黄锋
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