Approximate Equation of Bit Error Rate in DQPSK / OFDM Systems over Fading Channels
Approximate Equation of Bit Error Rate in DQPSK / OFDM Systems over Fading Channels
复制标题
衰落信道上 DQPSK / OFDM 系统误码率的近似方程
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
S. Oshita
中科院分区：
文献类型：
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作者：
F. Sasamori;Hiroyoshi Umeda;S. Handa;F. Maehara;F. Takahata;S. Oshita
对于作为多载波系统的一种，通过采用DQPSK作为副载波调制方法，可以根据传输信道的条件在时间域或频域使用差分编码/差分检测。本文提出了一种DQPSK/OFDM系统在频率非选择性Nakagami-Rice和Rayleigh衰落信道下误码率的近似推导方法。即使在系统参数如多普勒频率、莱斯参数等变化的情况下，由该近似方程得到的误码率与计算机模拟得到的误码率是一致的，从而证明了该方程的正确性。
With OFDM, which is a kind of multi-carrier systems, it is possible to use a diãerential coding/diãerential detection either in the time or frequency domain depending on the condition of transmission channels with the adoption of DQPSK as a method of subcarrier modulation. This paper proposes an approximate derivation method of the bit error rate (BER) in DQPSK/OFDM systems over frequency nonselective Nakagami-Rice and Rayleigh fading channels. The validity of this equation is conårmed from the fact that the BER derived from this approximate equation coincides with that from the computer simulation, even when the system parameters, for example Doppler frequency, Rician parameter and so on, are varied.