基于DSP的PI-4_DQPSK调制解调器的实现.pdf

第29 卷 第3 期 电 子 器 件 V ol. 29 No. 3 2006 年9 月 Chinese Journal of Electron Dev ices Sep. 2006 Implementation of P/ 4-DQPSK Modem Based on DSP H E Fei-y ang , GA O Jun , GA O Dao-en ( Electronics E ng . Colleg e, N aval Univ. of E ngineer ing , Wu an 430033, C ina) Abstract:T he P/ 4- DQPSK modem t echnolo gy w hich is w idely used in mo bile com municat ion and sat ell it e com municat ion is int oduced. An alg o it hm which is easy using DSP t o implement is g iven. Compa ing t o cohe ent alg o it hm, t his one has low e calculat io n, t he pe f o mance is goo d in ealtim e channel and the ha dw a e desig n is easy. T his pape g ives t he M onte Ca lo sim ulat ion abo ut t his p oject, and show s the BER cu ve of the theo et ical and ex pe imental consequence of t his p oject . It. s p ov ed that t his algo it hm is hig h eff iciency and it. s g ood enoug h t o fulf ill t he demand of ealtime com municat ion system. Key words: P/ 4- DQP SK; sym bo l t iming; DSP EEA :1250 DSP P/ 4-DQPSK 贺飞扬, 高 俊, 高道恩 ( , 430033) : P/ 4- DQ PSK DSP P/ 4- DQ PSK , , , , , , :P/ 4- DQ PSK ; ; DSP :TN911 :A :1005-9490(2006)03-0688-03 P/ 4- DQPSK , , , , P/ 4- DQPSK 1 P/ 4-DQPSK P. A . Bake OQ PSKQP SK , DSP OQ PSK Q PSK , ? P/ 4 , 1 ? 3P/ 4, 1800 k k [ 1] A B : , k k- 1 k k- 1 k I = I cosH - Q sinH ( 1) , , , Qk = Ik- 1 sinHk + Qk- 1 cosHk ( 2) ,