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Low-complexity and high-performance GFSK baseband timing synchronization method

A timing synchronization and low-complexity technology, applied in synchronization devices, multi-carrier systems, short-distance communication services, etc., can solve problems such as easy packet loss, poor synchronization performance, and affecting demodulation performance

Active Publication Date: 2020-12-25
YICHIP MICROELECTRONICS (HANGZHOU) CO LTD
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Problems solved by technology

[0008] 1) The traditional GFSK timing synchronization uses the received hard judgment bit to correlate with the original bit, and finds the synchronization position according to the correlation peak value. However, due to the existence of frequency offset, the synchronization performance is poor and it is easy to lose packets
[0009] 2) The frequency offset estimation of the existing timing scheme is inaccurate, which affects the demodulation performance of the reception

Method used

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  • Low-complexity and high-performance GFSK baseband timing synchronization method
  • Low-complexity and high-performance GFSK baseband timing synchronization method

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] A low-complexity and high-performance GFSK baseband timing synchronization method.

[0026] In the receiving process, the data sources of synchronization and differential demodulation are all differential angles, such as figure 1 As shown, the algorithm flow of receiving is just the opposite of that of transmitting. The physical meaning of the differential angle is frequency. The original bit is 1 to generate a positive frequency, and the original bit is 0 to generate a negative frequency. The differential angle and 0 are judged to get Demodulation bit, but the actual system has a frequency offset, so the frequency center value is not 0, and a frequency offset loop needs to be added. In the synchronization module, the original bit and the differential angle are used to correlate to find the synchronization position according to the correlation peak. ...

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Abstract

A low-complexity high-performance GFSK baseband timing synchronization method belongs to the technical field of modulated carrier systems and comprises the following steps: S1, taking differential angle data; S2, obtaining an initial correlation value CorrValue1; S3, obtaining the frequency offset FreqOffset; S4, calculating a final correlation value; S5, calculating the number SyncErr of synchronization errors; and S6, setting a correlation value threshold as Threshold, setting a synchronization error threshold as syncErrrThreshold, and determining whether the two conditions that the final correlation value CorrValue2 is greater than the correlation threshold Threshold and the number syncErr of synchronization errors is less than the synchronization error threshold syncErrThreshold are met or not.

Description

technical field [0001] The invention belongs to the technical field of modulation carrier systems, and particularly relates to a low-complexity and high-performance GFSK baseband timing synchronization method. Background technique [0002] With the rapid development of Internet technology, Internet-related communication network technology is gradually becoming mature, and mobile devices and products are increasing, and their role in life is becoming more and more prominent. "Bluetooth" is an open technical specification that enables wireless voice and data communications over short distances. It provides low-cost, short-range wireless communication, and can provide low-cost access services for fixed or mobile terminal devices, enabling various devices within a short distance to achieve seamless resource sharing. [0003] The modulation technology adopted by other wireless communication standard low-power technologies such as Bluetooth and 802.11 is GFSK. Therefore, the rese...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/38H04W4/80H04W56/00
CPCH04L27/38H04W56/0055H04W4/80
Inventor 左罡胡晨光高杰
Owner YICHIP MICROELECTRONICS (HANGZHOU) CO LTD
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