Patent ID: 9520900
Filing Date: 2016-12-13
CPC Classification: G06F,H03M,H04L

Claim Text:
1. A transmitter for transmitting a signal comprising an interleaved symbol stream, the transmitter comprising: a forward error correction encoder configured to encode a stream of data symbols into a plurality of forward error correction encoded frames, a convolutional interleaver comprising a plurality of delay portions each of which is arranged to delay symbols from the plurality of forward error correction encoded frames from an input to an output by a different amount of delay, the delay portions being arranged in a sequence; an interleaver selector providing an input interleaver selector and an output interleaver selector, configured to input the symbols from the plurality of forward error correction encoded frames to the delay portions so that successive symbols are input in accordance with the sequence of the delay portions; the output selector being configured to read the symbols from the delay portions by cyclically selecting the symbols from the outputs of the delay portions in accordance with the sequence of the delay portions to form interleaved forward error correction encoded frames, the input selector being arranged with the output selector so that each of the input and output selectors selects from the same delay portion, a frame builder configured to form the interleaved forward error correction frames into a physical layer frame, a controller configured to generate signalling data for transmission with the physical layer frame, the signalling data providing an indication of a position of the interleaver selector at the start of the physical layer frame, and a transmitter configured to transmit the physical layer frame and the signalling data.