상향링크 MIMO 전송에서 데이터와 다중화된 상향링크 DM-RS 전송 방법
정병장, 서방원, 안재영, 고영조
- 8718168 (2014.05.06)
- Provided is a multi-layer transmission method of multiplexing and transmitting data and a demodulation reference signal (DM-RS) sequence in an uplink digital Fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM) transmission employing multiple-input multiple-output (MIMO). The method includes allocating one DM-RS sequence as a DM-RS sequence of a first transmission layer for uplink transmission; allocating a DM-RS sequence whose cyclic shift (CS) value having the same sequence as the DM-RS sequence of the first transmission layer is configured to differ from that of the DM-RS sequence as a DM-RS sequence of a second transmission layer; and multiplexing layer-specific data and the layer-specific DM-RS sequences according to each of the first and second transmission layers. Accordingly, an RS can be transmitted in more OFDM symbols of a slot or subframe without an increase in overhead. Consequently, it is possible to satisfy requirements of LTE-advanced that a high frequency spectrum and a high mobile velocity should be supported, and transmit and receive a DM-RS multiplexed with data while maintaining orthogonality.
- KSP 제안 키워드
- Cyclic shift, DFT-S-OFDM, Demodulation reference signal, Frequency division, Frequency division multiplexing, Frequency spectrum, High Frequency(HF), High frequency spectrum, Long term evolution advanced(LTE-Advanced), MIMO transmission, Multi-layer transmission, Multiple input multiple output(MIMO), Orthogonal frequency division Multiplexing(OFDM), RS sequence, Reference signal, division multiplexing, fourier transform, mobile velocity, multi-layer, multiple-input, multiple-output, transmission layer, transmission method, uplink transmission