Transmission method, transmitter, reception method, and receiver

摘要

Provided is a transmission method that converts an encoded block of data into first complex symbols each including a real component and an imaginary component, one or which is designated as a first component and the other as a second component; writes the first components and the second components of the first complex symbols respectively column by column into a first interleaver matrix and a second interleaver matrix having NR rows; applies a cyclic shift to each column of the second interleaver matrix in accordance with a predetermined shift pattern; and reads the first components from the first interleaver matrix and the second components from the cyclically shifted second interleaver matrix row by row. NR is a multiple of NRF greater than NRF (NRF being an integer greater than one), and the shift pattern for the cyclic shift includes only integers that are not a multiple of NRF.

主权项

1. A transmission method for transmitting digital data over NRF frequency channels (NRF being an integer greater than one), the transmission method comprising the steps of:
encoding a block of data of a predetermined length with an error correction code; mapping the encoded block of data to a sequence of real-valued symbols a predetermined number of bits at a time; generating first complex symbols each including a real component and an imaginary component by (i) generating a plurality of D-dimensional rotated vectors by multiplying each of a plurality of D-dimensional vectors, each having D of the real-valued symbols as elements, with a D-by-D orthogonal matrix to convert the D-dimensional vector into a D-dimensional rotated vector having D real symbols as elements and (ii) mapping the D real symbols of each of the D-dimensional rotated vectors to D/2 consecutive first complex symbols; with one of the real component and the imaginary component designated as a first component and the other designated as a second component, writing the first components of the first complex symbols column by column into a first interleaver matrix having NR rows and writing the second components of the first complex symbols column by column into a second interleaver matrix having NR; applying a cyclic shift to each column of the second interleaver matrix in accordance with a predetermined shift pattern; reading the first components from the first interleaver matrix row by row and the second components from the cyclically shifted second interleaver matrix row by row to generate a plurality of second complex symbols; and transmitting the second complex symbols over the frequency channels by grouping consecutive second complex symbols into NR slices of equal length with each slice being mapped to one of the NRF channels, wherein NR is a multiple NRF greater than NRF, and the shift pattern for the cyclic shift includes only integers that are not a multiple of NRF.