1. Then the paper analyzes the principle of OFDM modulation techniques,establishes mathematical models and presents the advantages of OFDM technology. 介绍了PLC电磁辐射产生的原因、影响因素和抑制措施,电磁辐射可通过OFDM调制技术灵活的选择载波频率得到抑制。
Orthogonal Frequency Division Multiplexing (OFDM) has become the modulation technique for many wireless communication standards. In a wireless system, a signal transmitted into channel bounces off from various surfaces resulting in multiple delayed versions of the transmitted signal arriving at the receiver...
Orthogonal Frequency Division Multiplexing (OFDM) is the multicarrier digital modulation technique used by modern wireless communications systems such as 5G and LTE cellular, and WiFi. The advantages of OFDM over other techniques, such as single carrier QAM, include support of higher data rates with...
However, the combination of many subcarriers enables data rates similar to conventional single-carrier modulation schemes within equivalent bandwidths. OFDM is based on the well-known technique of Frequency Division Multiplexing (FDM). In FDM different streams of information are mapped onto separate ...
OFDM modulation and demodulation are typically (as of 2001) implemented using数字滤波器banks generally using the快速弗利叶变换(FFT). Although highly complex, COFDM has high performance under even very challenging channel conditions. By combining the OFDM technique with error-correcting codes, adaptive ...
OFDM modulation technique is also adopted by IEEE 802.11a/g wireless LAN [5], [6]. The operation and detailed study about the OFDM is presented in several literatures [7], [8], [9]. On the other hand, recently the multiple input multiple output (MIMO) technique has become potentially ...
However, the combination of many subcarriers enables data rates similar to conventional single-carrier modulation schemes within equivalent bandwidths. OFDM is based on the well-known technique of Frequency Division Multiplexing (FDM). In FDM different streams of information are mapped onto separate ...
Theoretical and experimental study of mm-wave RoF/wireless system based on OFM technique with OFDM modulationModulationOrthogonal frequency division multiplexing... R Lin,S Zou,Y Cai,... - 《Proc Spie》 被引量: 1发表: 2011年 The design of bidirectional ROF system based on CO-OFDM In this ...
OFDM is based on the well-known technique of Frequency Division Multiplexing (FDM). In FDM different streams of information are mapped onto separate parallel frequency channels. Each FDM channel is separated from the others by a frequency guard band to reduce interference between adjacent channels. ...
In this advanced technique, orthogonal frequency-division multiplexing (OFDM) modulation is used together with differential phase shift keying (DPSK) over adjacent frequency domain elements. A particular point of this study is to build up a framework that is demonstrated tolerant to camera movements, ...