TABLE A1.4 Parameters for MIMO transmission Modulation method OFDM Occupied bandwidth 5.57 MHz Carrier modulation 4096-QAM FFT size (number of radiated carriers) 32K (22,465) interval ratio (guard interval duration) 1/32 (126 μs) Inner code: LDPC, coding rate R = 3/4 Error-correcting code Outer code: BCH Transmission capacity 91.8 Mbit/s TABLE A1.5 Specifications of Hitoyoshi and Mizukami stations Hitoyoshi station Mizukami station Transmission frequency 671.142857 MHz (UHF ch46 in Japan) Horizontal: 10 W Horizontal: 3 W Transmission power Vertical: 10 W Vertical: 3 W Horizontal: 140 W Horizontal: 25 W ERP Vertical: 135 W Vertical: 25 W Transmitting antenna height 632 m trial sea level 1080 m above sea level FIGURE A1.12 Equipment of MIMO experimental stations FIGURE A1.13 Transmission and reception antennas for UHF The 22 MIMO STC-SFN system was developed for this experiment as shown in Fig. A1.14. STC is a method of encoding carrier symbols. An STC code is applied for the four carrier symbols of the two transmission antennas each of two transmission stations. Here, is a carrier symbol of a s constellation with a complex value, and means the complex conjugate. The transmitted symbols “*” and are encoded, -s2* and are transmitted in time and and -s1* s0, s1, s2 s3 s0, s1, s3* t, s2, s3, s0* are then transmitted in time from each antenna. In the transmission model, the transmitting t+1, carrier symbols are denoted as and and the receiving carrier symbols as and is x0, x1, x2 x3, y0 y1. h the channel response estimated by scattered pilot (SP), and is the component corresponding to hij the receiving antenna and transmitting antenna. In the reception model, the transmitted ith jth symbols and are obtained by decoding the received symbols and which are s0, s1, s2 s3 y0 y1, received at two discrete times.
TABLE A1.4 Parameters for MIMO transmission Modulation method OFDM Occupied bandwidth 5.57 MHz Carrier modulation 4096-QAM FFT size (number of radiated carriers) 32K (22,465) interval ratio (guard interval duration) 1/32 (126 μs) Error-correcting code Inner code: LDPC, coding rate R = 3/4 Outer code: BCH Transmission capacity 91.8 Mbit/s TABLE A1.5 Specifications of Hitoyoshi and Mizukami stations Hitoyoshi station Mizukami station Transmission frequency 671.142857 MHz (UHF ch46 in Japan) Transmission power Horizontal: 10 W Vertical: 10 W Horizontal: 3 W Vertical: 3 W ERP Horizontal: 140 W Vertical: 135 W Horizontal: 25 W Vertical: 25 W Transmitting antenna height 632 m sea level 1080 m above sea level FIGURE A1.12 Equipment of MIMO experimental stations FIGURE A1.13 Transmission and reception antennas for UHF The 22 MIMO STC-SFN system was developed for this experiment as shown in Fig. A1.14. STC is a method of encoding carrier symbols. An STC code is applied for the four carrier symbols of the two transmission antennas each of two transmission stations. Here, s is a carrier symbol of a constellation with a complex value, and “*” means the complex conjugate. The transmitted symbols s0, s1, s2 and s3 are encoded, s0, s1, -s2* and s3* are transmitted in time t, and s2, s3, s0* and -s1* are then transmitted in time t+1, from each antenna. In the transmission model, the transmitting carrier symbols are denoted as x0, x1, x2 and x3, and the receiving carrier symbols as y0 and y1. h is the channel response estimated by scattered pilot (SP), and hij is the component corresponding to the ith receiving antenna and jth transmitting antenna. In the reception model, the transmitted symbols s0, s1, s2 and s3 are obtained by decoding the received symbols y0 and y1, which are received at two discrete times. trial
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