Motorola BSR 2000 manual Interleaver-block-size 32-2048no interleaver-block-size

BSR 2000 Command Reference Guide Release 1.0

interleaver-block-size

The interleaver-block-sizecommand specifies the interleaver block size for an ATDMA or MTDMA channel. Interleaving is a technique which improves the error correction of channel noise such as burst errors. The interleaver re-arranges transmitted data and distributes it among different interleaver blocks. At the receiver end, the interleaved data is arranged back into the original sequence by a de-interleaver. By intermixing the transmitted data and reassembling it on the receiver end, any transmission errors are spread out over a greater transmission time.

Forward error correction (FEC) is very effective on errors that are spread out. Interleaving spreads bursts of errors over several blocks so that the maximum number of errors in each block stays within the number of correctable errors. Since most errors occur in bursts, this is an efficient way to improve the error rate. Interleaver transmissions do not transmit each codeword by itself, but instead send bits from multiple codewords at the same time, so that a noise burst affects the minimum number of bits per codeword. This allows the FEC algorithm a greater chance of detecting and correcting any transmission errors.

Group Access

MSO

Command Mode

Modulation Profile Configuration

Command Line Usage

interleaver-block-size <32-2048>no interleaver-block-size <32-2048>

Command Syntax

32-2048	the ATDMA or MTDMA interleaver block
	size value

11-146 MGBI 526363-001-00 Rev. B