Patent ID: 7908545
Filing Date: 2011-03-15
Classification: H03M

Abstract:
1. A method for determining binary states of received signals, comprising: receiving data bits, each data bit being accompanied by at least one parity bit; providing each received data bit with associated data and an address at which the associated data is located; storing the received data bits with the associated data and the address of the associated data in a first memory; during a first window, performing a forward metric calculation on each data bit and associated data in a given order; storing each calculated forward metric in a second memory; during a second window, performing a forward metric calculation on each received data bit and associated data in the given order; reading out each forward metric calculated during the first window from its memory location in the second memory a and reading in the forward metric calculated during the second window into the memory location from which the forward metric calculated during the first window is read out; and employing data stored in the first memory during the first window and forward metrics calculated during the first window to calculate reverse metrics during the second window.