Research Article
An Interleave-Division Multiplexing (IDM) based Modulation for 3GPP LTE Downlink
@INPROCEEDINGS{10.1109/CHINACOM.2008.4685068, author={Dageng Chen and Yi Wang and Jiayin Zhang}, title={An Interleave-Division Multiplexing (IDM) based Modulation for 3GPP LTE Downlink}, proceedings={The Fourth Generation Wireless Communications and Beyond}, publisher={IEEE}, proceedings_a={CHINACOM2008-INDUSTRIAL}, year={2008}, month={11}, keywords={Orthogonal Frequency Division Multiplexing (OFDM) Interleave-Division Multiple-Access (IDMA) Layered-Modulation (LM) Code Divison Multiple Access (CDMA)}, doi={10.1109/CHINACOM.2008.4685068} }- Dageng Chen
Yi Wang
Jiayin Zhang
Year: 2008
An Interleave-Division Multiplexing (IDM) based Modulation for 3GPP LTE Downlink
CHINACOM2008-INDUSTRIAL
IEEE
DOI: 10.1109/CHINACOM.2008.4685068
Abstract
Interleave-Division Multiple-Access (IDMA) is an efficient multiple access technique to improve high spectrum efficiency for cellular communications. In this paper IDM-based modulation (called layered modulation (LM)) is proposed for OFDM systems. The idea of LM is to multiplex multiple parallel layers of data streams by performing repetition and layer-specific interleaver on each layer. Since LM code bits are fully distributed in time-frequency plane, by the aid of low-complexity chip-by-chip interference cancellation time-frequency diversity can be well exploited in LM. Applying LM to 3GPP LTE downlink, we compare LM to M-PSK/QAM modulation. Numerical results show that the LM can achieve superior performance over M-PSK/QAM. The performance gain over QPSK, 8PSK and 16QAM is 1.1dB, 2.2dB and 0.6dB, respectively.
