Synchronization method and device of multi-user spread spectrum communication system, and receiving and sending device of multi-user spread spectrum communication system
A spread spectrum communication, multi-user technology, applied in transmission systems, baseband system components, electrical components, etc., can solve the problem of high complexity of receiver synchronization and frequency offset estimation, and achieve the effect of low complexity and good performance
Pending Publication Date: 2022-04-08
BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY +1
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Problems solved by technology
In related technologies, different users are distinguished by using different slopes, amplitudes, and zadoff-chu codes through different preamble symbols, but the complexity of synchronization and frequency offset estimation at the receiving end is relatively high in this way
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[0067] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0068] The following describes the synchronization method, device, medium, receiving and sending device of the multi-user spread spectrum communication system proposed by the embodiments of the present invention with reference to the accompanying drawings.
[0069] figure 1 It is a flow chart of a synchronization method of a multi-user spread spectrum communication system according to an embodiment of the present invention. Taking the method applied to the receiving end as an example, refer to figure 1 As shown, the synchronizat...
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The invention discloses a synchronization method and device of a multi-user spread spectrum communication system and a receiving and sending device, and the method comprises the steps: receiving M1 up chirp sending symbols and M2 down chirp sending symbols sent by users to obtain M1 up chirp receiving symbols and M2 down chirp receiving symbols, different users correspond to different spread spectrum factor groups, and the M1 up chirp receiving symbols and the M2 down chirp receiving symbols correspond to the M2 down chirp sending symbols; the spreading factor group comprises a first spreading factor of up chirp sending symbols and a second spreading factor of down chirp sending symbols, and M1 and M2 are positive integers; and estimating time offset and frequency offset according to the M1 up chirp receiving symbols, the M2 down chirp receiving symbols, the first spreading factor and the second spreading factor. Therefore, multiple users can be effectively distinguished, the performance is good, and the complexity is low.
Description
technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a synchronization method, device, medium, receiving and sending device of a multi-user spread spectrum communication system. Background technique [0002] Due to its strong anti-interference, low power consumption, and anti-multipath effects, Chirp spread spectrum has been widely used in radar detection, underwater acoustic communication, laser communication, ultra-wideband communication and LORA communication. Chirp signals combined with different digital modulation methods show better communication performance. The modulation of Chirp signals basically includes two methods: BOK (Binary Orthogonal Keying, Binary Orthogonal Keying) and DM (Direct Modulation, Direct Modulation). Among them, DM is modulated in other ways (such as DPSK (Differential Phase Shift Keying, differential phase shift keying), DQPSK (Differential Quadrature Reference Phase Shift Keyin...
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Login to View More IPC IPC(8): H04B1/717H04B1/7183H04L25/02
Inventor 赵楠李德建赵旭赵东艳张鹏甘杰张玉冰赵亚红
Owner BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY