Pulse UWB (Ultra Wide Band) communication system based on CS (Compressed Sensing) theory

Abstract

The invention discloses a pulse UWB (Ultra Wide Band) communication system based on a CS (Compressed Sensing) theory. A digital signal (X) transmitted by a transmitting terminal is effectively observed by introducing signal detection in the CS theory through a sparse algorithm in a digital signal processor, combining a random precoding module added at the transmitting terminal and matching with a pulse generating module, a UWB channel and a low-speed sampler, and a common recovery reconfiguration algorithm in the CS theory is utilized to recover and reconstruct the digital signal (X) and realize communication. In the communication system provided by the invention, a plurality of parallel correlators and low-speed samplers needed in a first parallel scheme are not needed at a receiving terminal so that the problem of high hardware implementation complexity in the parallel scheme is solved; meanwhile, the low-speed sampler is directly used at the receiving terminal for sampling, and an analogue information converter is not used, so that the influence of the causality of a low-pass filter in the analogue information converter on observation is avoided and the problem of sparse observation matrix caused by the causality in a serial scheme is solved.

Description

technical field [0001] The invention relates to a pulse ultra-wideband communication system, in particular to a pulse ultra-wideband communication system based on CS theory. Background technique [0002] Pulse Ultra Wideband (UWB) technology, as a wireless communication technology solution, is widely used in wireless sensor networks and high-precision positioning due to its advantages of low complexity, low cost, high positioning accuracy, and the ability to share spectrum with other systems. It has broad application prospect in navigation system. like figure 1 Shown is a structural diagram of a UWB communication system, including a transmitter 1 , a UWB channel 2 and a receiver 3 . Wherein, the transmitter 1 includes a pulse generation module 101, which generates a UWB pulse, and the digital signal X is loaded to the UWB pulse to obtain a transmission signal u(t) , sent to the receiving end 3 through the UWB channel 2, the receiving end 3 includes a radio frequency fron...

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Problems solved by technology

The system hardware implementation complexity of this solution is low, but there are two other disadvantages: 1) Since the analog low-pass filter 3052 is causal, this feature will make the observation matrix under the CS theory constructed by the analog information converter 305 become sparse, thereby reducing the effectiveness of observation points, resulting in poor performance of the communication system; 2) The communication system requires a high chip rate of the pseudo-random sequence generator 3051, which also increases the power consumption of the system

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