Patent ID: 8576696

Claim:
A mobile multimedia broadcast transmission system, comprising: a Reed-Solomon (RS) coding and byte interleaving unit for RS coding and byte interleaving an upper layer data stream through a physical logical channel; a Low Density Parity Check (LDPC) coder for LDPC coding the data output from the RS coding and byte interleaving unit to obtain bit data; a bit interleaver for bit interleaving the bit data output from the LDPC coder; a constellation mapper for constellation mapping the data output from the bit interleaver; a frequency domain symbol generator for multiplexing discrete pilots, continuous pilots containing system information and constellation mapped data symbols into OFDM frequency domain symbols; a scrambler adapted for scrambling the OFDM frequency domain symbols with a pseudo-random sequence; an Inverse Fast Fourier Transformer (IFFT) for IFFT transforming the frequency domain symbols output from the scrambler to generate OFDM time domain symbols; a time domain framer for forming the OFDM time domain symbols into time slots and concatenating the time slots into a physical layer signal frame; and a transmitter for converting the physical layer signal frame from baseband to radio frequency for transmission, wherein the transmitter is configured for signal transmission over any 6 MHz bandwidth in a wireless channel, and wherein the physical layer signal frame has a duration of one second and includes 40 time slots each having a duration of 25 ms, each time slot including one beacon and 53 OFDM symbols, the beacon including one transmitter identification signal and two identical sync signals, the transmitter identification signal is identified by 141-bit information, carried by a number N ID =256 of sub-carriers and modulated with BPSK, the transmitter identification signal TxID(k) being generated by mapping a transmitter identification sequence according to: X ID ⁡ ( i ) = { 1 - 2 × TxID ⁡ ( i - 1 ) , 1 ≤ i ≤ 70 0 , i = 0 ⁢ ⁢ or ⁢ ⁢ 71 ≤ i ≤ 184 1 - 2 × TxID ⁡ ( i - 115 ) , 185 ≤ i ≤ 255.