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Generation Method of Synchronization Signal in Micropower Wireless Communication System Based on Ofdm Modulation

A micro-power wireless, synchronization signal technology, applied in wireless communication, synchronization devices, multi-frequency code systems, etc., can solve the problem that the receiving end cannot perform correct demodulation, information errors, etc., achieve good symbol synchronization performance, and correct frequency offset. , the effect of good carrier frequency synchronization performance

Active Publication Date: 2017-10-10
深圳市力合微电子股份有限公司
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Problems solved by technology

[0005] Although OFDM technology has and is not limited to the above-mentioned many advantages, the quality of synchronization performance is related to the transmission performance of the entire OFDM system. If good synchronization cannot be performed, it will cause errors in the transmitted information, or the receiving end cannot perform correct demodulation

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  • Generation Method of Synchronization Signal in Micropower Wireless Communication System Based on Ofdm Modulation
  • Generation Method of Synchronization Signal in Micropower Wireless Communication System Based on Ofdm Modulation
  • Generation Method of Synchronization Signal in Micropower Wireless Communication System Based on Ofdm Modulation

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Embodiment Construction

[0030] The present invention will be further described below with reference to the accompanying drawings and in combination with preferred embodiments.

[0031] Concept description: The short synchronization signal and long synchronization signal, short preamble sequence and long preamble sequence mentioned in this article, the "long" and "short" are relative concepts in terms of points or length.

[0032] In the detailed description part, a kind of such as figure 1 The synchronization signal generating method shown is used to generate the synchronization signal of the OFDM micropower wireless communication system, and the method specifically includes the following steps:

[0033] Step 101: According to the system parameters of the OFDM system and a group of BPSK modulation signals carrying the first pseudo-random sequence, generate an OFDM short synchronization signal S_S with a point number of N / 2;

[0034] Step 102: Construct a short preamble S_P based on the short synchroni...

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Abstract

The invention discloses a synchronizing signal generation method of a micro-power wireless communication system based on OFDM modulation. The method comprises the following steps that A, a length of OFDM short synchronizing signals S_S with the point number being N / 2 are generated according to parameters of an OFDM system and a set of BPSK modulating signals carrying a first pseudo random sequence, and a length of OFDM long synchronizing signals L_S with the point number being N are generated according to the parameters of the system and another set of BPSK modulating signals carrying a second pseudo random sequence, wherein the first pseudo random sequence and the second pseudo random sequence have different lengths; B, a first leader sequence S_P is constructed on the basis of the short synchronizing signals S_S, and a second leader sequence L_P is constructed on the basis of the long synchronizing signals L_S, wherein the length of the first leader sequence S_P is smaller than that of the second leader sequence L_P; C, a sequence is combined by placing the front leader sequence S_P in front of the second leader sequence L_P, and synchronizing signals Sync are constituted. The parameters of the system comprise the IFFT point number N, subcarrier spacing and the number of effective subcarriers of the OFDM system.

Description

technical field [0001] The present invention relates to a micro-power wireless communication system, in particular to a method for generating a synchronous signal of a micro-power wireless communication system based on OFDM modulation. Background technique [0002] Micropower wireless communication technology uses frequency modulation to load information on high-frequency electromagnetic waves, and uses space propagation to communicate data. Micro-power wireless communication technology is supported by a complete standard system abroad, the main standards are IEEE 802.15.4 (LR-WPAN), EN13757 (network with relaying nodes), ZigBee, WSN, which are used in home wireless applications and energy in Europe and the United States. metered data communications. But foreign standard technology is not suitable for our national conditions. [0003] With the rapid development of my country's smart grid, micro-power wireless communication technology is also applied to the collection of el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04L27/26
Inventor 不公告发明人
Owner 深圳市力合微电子股份有限公司
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