Patent ID: 8397109

Claim:
A bit mapping method for a transmitter of a communication system, comprising the steps of: arranging, at a controller of the transmitter, a plurality of coded bits in a codeword in an order of recovery capability from a highest recovery capability to a lowest recovery capability; setting, at the controller, a shift region in the arranged plurality of coded bits that includes a number of coded bits having lowest recovery capabilities, wherein the number of coded bits is less than the plurality of coded bits; rearranging, at a bit shifter of the transmitter, the plurality of coded bits by shifting the number of coded bits in the shift region, in a direction toward a coded bit with the highest recovery capability within the plurality of coded bits, by a number of bits indicated by a shift factor; and mapping, at a bit mapper of the transmitter, the rearranged coded bits into a modulation symbol in an order of reliability from a lowest reliability bit position to a highest reliability bit position of the modulation symbol.