Arrangement and method for channel mapping in a wireless communication system

A mobile user equipment for operating in a wireless communication system, the mobile user equipment comprising:

• first interleaving logic for interleaving a bit sequence comprising systematic bits to produce an interleaved systematic bit sequence;
• second interleaving logic for interleaving a bit sequence comprising parity bits to produce an interleaved parity bit sequence;
• and
• mapping logic for mapping bits in accordance with a modulation scheme such that:
• bits from the interleaved systematic bit sequence are mapped to high reliability bits of the modulation scheme and bits from the interleaved parity sequence are mapped to low reliability bits of the modulation scheme, and
• the systematic bits and the parity bits are mapped to physical channels in different ones of a forward direction and a reverse direction.

A mobile user equipment for channel de-mapping in a wireless communication system, the mobile user equipment comprising:

• de-mapping logic for de-mapping bits in accordance with a modulation scheme;
• ungrouping logic arranged to ungroup groups of the bits to produce an interleaved parity bit sequence and an interleaved systematic bit sequence, the groups of the bits each comprising parity bits and systematic bits, wherein the systematic bits and the parity bits are mapped to physical channels in different ones of a forward direction and a reverse direction;
• first deinterleaving logic for deinterleaving the systematic bit sequence to produce a deinterleaved systematic bit sequence comprising systematic bits;
• and
• second deinterleaving logic for deinterleaving the parity bit sequence to produce a deinterleaved parity bit sequence comprising parity bits.