Underrecovery system and method for block processing modems

Details Underrecovery system and method for block processing modems Underrecovery system and method for block processing modems

1995-09-28

1998-08-11

Chin, Wellington

Pulse or digital communications

Transceivers

Modems

375219, 375357, 370230, 370236, H04B 138

Patent

active

057938032

ABSTRACT:
A system for detecting an underrun condition in a block processing modem and upon detection retransmitting previously transmitted data or a fixed pattern of data. The system has a register or memory location that counts the symbols in a buffer located between the microprocessor and the DSP. As a symbol is added to the buffer by the microprocessor, the register is incremented. As a block of symbols is taken from the buffer by the DSP, the register decremented. Thus at any point in time, the register contains a count of the symbols in the buffer. When The DSP is ready for a next block of symbols, logic in the DSP compares the symbol count in the register and if the count is too low for the block of symbols to be passed to the DSP, the DSP itself sends either the previous set of data or a fixed pattern of data to the AFE. The error detection software operating in the software layer above the data pump detects an error and requests a retransmission.

REFERENCES:
patent: 4697281 (1987-09-01), O'Sullivan
patent: 5444704 (1995-08-01), Henderson et al.
patent: 5450530 (1995-09-01), Snyder et al.

Affiliated with

Also associated with

Rating

Underrecovery system and method for block processing modems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Underrecovery system and method for block processing modems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Underrecovery system and method for block processing modems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-397566