Comparision of frequency and time domain differential modulation in an OFDM system for wireless ATM
Comparision of frequency and time domain differential modulation in an OFDM system for wireless ATM
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无线 ATM 的 OFDM 系统中频域和时域差分调制的比较
DOI：
10.1109/vetec.1999.780469
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
Matthias Lott
中科院分区：
文献类型：
--
作者：
Matthias Lott
5.2GHz的无线ATM系统将使用OFDM作为传输方案，以对抗频率选择性无线电信道。差分调制（例如DQPSK）被提出与OFDM相结合以提供成本有效的解决方案而不需要均衡。根据差分调制符号是被放置在相邻OFDM符号的相同子载波上还是被放置在相同OFDM符号的不同子载波上，可以区分时域调制和频域调制。基于频域和时域差分调制的OFDM/DQPSK传输方案的新的闭合形式BER表达式，研究了5.2GHz无线ATM的无线信道特性和协议性能。
Wireless ATM systems at 5.2 GHz will use OFDM as the transmission scheme to combat the frequency selective radio channel. Differential modulation, e.g. DQPSK, is proposed in combination with OFDM to provides a cost-effective solution without the need for equalization. Depending on whether the differential modulated symbols are placed on the same sub-carrier of adjacent OFDM symbols or on different sub-carriers of the same OFDM symbol time domain and frequency domain modulation can be distinguished. Based on new closed-form BER expressions for OFDM/DQPSK transmission schemes with frequency and time domain differential modulation the performance with regard to the radio channel characteristic and the protocols for wireless ATM at 5.2 GHz are investigated.