Research On Frequency Hopping Sequence In Spread Spectrum Communication

Bring a model alternative to the relatively narrow bandwidth of the original info-rmationto communicate with a wider frequency spread spectrum communication,the adventof this new technology to the field of communications technology innovation has brought tremendous power. Spread spectrum communication has been applied in many ways, for example, used in military radar, civil Bluetooth. The Frequency-hopp-ing communications (FH) is the most concerned about a class of spread spectrum co-mmunication, which is the ability of this means of communication have strong to wit-hstand all aspects of noise interference.Spread spectrum communications and frequency hopping communication in the first and second chapters, a brief exposition of some of the parameters of the hopping sequence described, such as the cross-correlation between the sequence, since the cor-relation. Hopping sequence a variety of one type of the most basic is to use the m seq-uence to get it works using the shift register mode two plus. Next, research and analy-sis based on the method of frequency hopping sequence of m sequences, the usual me-thod of L-G model, also based on the derived two modes:non-contiguous-tap mode, the clock sampling mode, and into the Comparison of Performance. At the same time. Matlab/Simulink system simulation and analysis of the basic m sequence of frequen-cy hopping communication system model, based on m-sequence, frequency hopping system performance is excellent.RS code hopping sequence of another sequence, the RS code is a special class of BCH code, BCH code, it simply is to use the excess of the original number of inform-Ation bits to represent the original information bits, such as5-bit binary code to rcpre-Sent the original3is the information code. Hopping sequence using the RS code gen-eration system, and before m-sequences and the L-G model performance were analyz-ed, together with the parameters of comparison between them was informed that the RS code hopping sequence in the relevant performance and jumpfrequency of the seq-uence number of the above Jie have a greater advantage. Gold sequence generator fre-quency hopping sequence and the sequence of prime numbers to generate the frequen-cy hopping sequence analysis. Through research and analysis, plus the Gold codes an- d RS codes but was informed that the RS code is more conducive to the transmission of signals in the frequency hopping communication system in some songs. Gold code sequence and the prime number sequence described, and the m sequence frequency hopping systems were compared under the same conditions and interference, the pref-ormance of Gold code sequences to be slightly worse than the m sequence performan-ce.Finally, a more comprehensive summary of work done on the full-text, summari-zes the research work done, but also the future direction of the outlook.