Method and apparatus for determining the reason of log likelihood with pre encoding

摘要

Method and apparatus for determining the reason of it gverossimilhanu00e7a with pre coding ".A device and method for recovering data transmitted in a wireless communication system are claimed.A plurality of signal points, the signal point comprising a plurality of modulation symbols of a plurality of coded bits is received.A first subset of signal points for which a bit is equal to a first value and a second subset of signal points for which the bit is equal to a second value are determined.The first and second components are points of signal of a signal constellation is expanded.The probability of the bit is equal to the first value and the second value is determined as a function of the point of received signal.A soft decision symbol may then be determined based on the probability of the bit is equal to the first value and the second value.The soft decision symbols can be represented as log likelihood ratios.