The Reaserch Of UWB Communication System Based On Truncated Balance Gold Code

Ultra-wideband (UWB) communication is a novel short-distance wireless communication technique, in which data are transferred using non-sinusoidal pulses with very short duration. It has many advantages, such as high transmission rate, low power consumption, good security, robustness to multi-path and low cost. Especially, it does not need extra frequency spectrum, and can coexist with the existing wireless communication systems at the same frequency band, which makes it attract much attention nowadays when the frequency spectrum resource has become more and more precious. In this paper, the UWB communications system based on truncated balanced Gold codes was researched from multi-path channel of the Rake receiver and multi-user interference, and get some meaningful results, the principal tasks summarized as follows:1. Analysis of truncated balanced Gold code generation principle, given truncated balanced Gold code generation methods, and verify the feasibility of the method. Introduced the UWB channel model, and discussed the general builds model process of UWB wireless communication channel model. Second, highlight introduced the S-V channel model and Intel channel model, and analyzed the Intel channel model. Finally, summarized the UWB wireless channel characteristics.2. Given the send and receive terminal model of multi-path channel Rake receiver, using truncated balanced Gold codes instead of the traditional time-hopping code, analyzed the All Rake receiver (A-Rake,), Partial Rake receiver (P-Rake) and selective Rake receiver (S-Rake) of these three Rake receivers performance which under the PPM and PAM two kinds of modulation, and make a lot of simulation. The results show that the performance of truncated code is superior to the traditional code's performance; under the same conditions, the receiver's error performance which using PAM modulation is better than using PPM modulation's performance.3. The UWB communication system's principle which under the multi-user interference was detailed analyzed, and established the communication system model. Under the PPM and PAM two kinds of modulation, analyzed the system's performances which have multi-user interference. Through a large number of simulation experiments, the results show that: in the same modulation mode, the system's performance which using truncated code is superior to the traditional system's performance.