Detection method for low-power consumption Bluetooth data packet
A low-power bluetooth and detection method technology, applied in the direction of energy consumption reduction, short-distance communication service, advanced technology, etc., can solve the problems that low-power bluetooth data packet detection performance affects the overall receiving performance of low-power bluetooth receivers, etc. , to reduce computational complexity and improve sensitivity
Inactive Publication Date: 2019-03-15
SHANGHAI HUAHONG INTEGRATED CIRCUIT
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The detection performance of Bluetooth low energy packets can significantly affect the overall reception performance of Bluetooth low energy receivers
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[0038] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0039] The block diagram of the detection method of the bluetooth low power consumption packet of the present invention is as figure 1 As shown, modules including received signal oversampling, time domain difference, correlation calculation, characteristic observation, symbol rate sampling and PDU demodulation are implemented through the following four steps:
[0040] Step 1: The received signal is oversampled by 16 times, and the symbol rate of Bluetooth low energy is 1M symbols / s, so the sampling rate of the received signal is 16M samples / s, and the time domain difference sequence of the received signal is calculated. The signal is multiplied by the conjugate value of the received signal 16 sampling periods ago, through the following process:
[0041] RxDiffReal(n)=real{Rx(n)}real{Rx(n-16)}+imag{Rx(n)}imag{Rx(n-16)}(15)
[0042] RxDiffImag(n...
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The invention relates to the technical field of wireless communication, and discloses a detection method for a low-power consumption Bluetooth data packet. Firstly, a time-domain differential sequenceof a received signal is computed by adopting oversampling; secondly, a correlation value between the time-domain differential sequence of the received signal and a local synchronous sequence is computed; thirdly, signal features of the correlation value are observed, and when the signal features meet expected features, the data packet is detected; and finally, after the data packet is detected, the position of a symbol synchronous sampling point and the position of a PDU start point are determined, and the received signal is sampled and subjected to PDU demodulation by taking the position ofthe symbol synchronous sampling point as a reference at a symbol rate. The local synchronous sequence is composed of +1 and -1 and generated according to mapping of a Preamble and an Access address sequence of the low-power consumption Bluetooth data packet, and therefore computing of the correlation value is easy. Simulation shows that under a Gaussian additive noise channel, the detection probability of the detection method for the data packet is about 99% when SNR=10 dB.
Description
technical field [0001] The invention relates to the field of wireless communication, in particular to a detection method of a low-power bluetooth data packet. Background technique [0002] Bluetooth Low Energy (BLE) is a short-distance, low-cost and low-power wireless communication technology used to realize wireless connections between mobile phones, tablet computers, laptops and other smart devices and peripheral electronic devices . Bluetooth low-power communication has the characteristics of high reliability, security, and ease of use, and is designed with low power consumption as one of the most powerful wireless access technologies in the field of Internet of Things. Bluetooth low energy works in the 2.4G unlicensed frequency band [1], divides the 80MHZ bandwidth wireless channel into 40 channels, each channel bandwidth is 2MHz, and uses adaptive frequency hopping communication between different channels to enhance the system's anti-corrosion Interference performance...
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IPC IPC(8): H04W4/80H04W24/06H04W56/00
CPCH04W24/06H04W56/00H04W4/80Y02D30/70
Inventor 车小林舒海军赵贵勇
Owner SHANGHAI HUAHONG INTEGRATED CIRCUIT