DEVICE AND METHOD FOR DIGITAL TRANSMISSION BASED ON MULTI-CODE TRANSMISSION ARCHITECTURE USING BLOCK ORTHOGONAL EXTENDED TRANSORTHOGONAL CODES

摘要

The present invention is a data of a bit k (a natural number other than k is 4 or a small number) to be input r (r is a natural number of 2 or more) of bits L (L is a natural number of 2 or more, k = L · r Im) divided into a number of data bit partition and said bits receives the r-bit output from the division block perpendicular (orthogonal) extend trans o Sogo day (transorthogonal) and the L waveform encoder for outputting a code word for modulation, the L waveform encoder for output that adds the signals of the code word in the sum of groups, to a digital transmission device based on the block orthogonal extension trans o orthogonal multi-code transmission using the day code including a modulation band-pass for mixing a carrier with the output signal of the summer. ; According to the invention, by dividing a basic trans-orthogonal extended code set sequentially block by orthogonal to establish and block perpendicular extended code set in the sub-set with the waveform coder by ensuring that transmission codes selected from each sub-set simultaneously while maintaining a very strong resistance to noise from the digital modulation it is significantly improved bandwidth efficiency compared to the quadrature modulation of a single code. ; Waveform coding, orthogonal code, Walsh code, trans-orthogonal code, the Hadamard matrix