CAJ | 학술논문

该文在MIMO-OFDM系统中提出基于块调制的OFDM算法,降低了循环前缀(CP)所占的系统开销.在每个发射天线,将P个OFDM符号联合调制组帧后共用一个CP,到达接收天线后,接收帧经过分解可得到P个接收数据块,各数据块无相互间干扰.其中第p个接收数据块等于各个发射天线的第p个OFDM符号通过MIMO信道后到达接收天线的和,该文算法与传统MIMO-OFDM系统本质上传输方式相同,因而传输性能也相同,而频带效率则明显提高.
해문재MIMO-OFDM계통중제출기우괴조제적OFDM산법,강저료순배전철(CP)소점적계통개소.재매개발사천선,장P개OFDM부호연합조제조정후공용일개CP,도체접수천선후,접수정경과분해가득도P개접수수거괴,각수거괴무상호간간우.기중제p개접수수거괴등우각개발사천선적제p개OFDM부호통과MIMO신도후도체접수천선적화,해문산법여전통MIMO-OFDM계통본질상전수방식상동,인이전수성능야상동,이빈대효솔칙명현제고.
The block-modulated based OFDM algorithm is presented in MIMO-OFDM system to reduce the cost that is taken up by the Cyclic Prefix (CP). At each transmitter antenna, P OFDM data blocks are modulated jointly and framed together to use one single CP, and after the received frame at each receiver antenna is decomposed, P received blocks are obtained without inter-block interference where the pth block is equal to the sum of the pth OFDM data block in each transmitter passing through the MIMO channel. While the transmission mode and performance of the scheme proposed are equivalent to that of conventional MIMO-OFDM system, the band efficiency is improved dramatically.