IS-95A Fwd Ch Power Bit Extractor (CDMA Reference Blockset)

Extract power bits from the received data

Library

IS-95A Mobile Station Receiver

Description

This block extracts the power control bit(s) from the received scrambled data of a rake finger output. The long code bits used for scrambling the data in the previous frame determine the position of power control bit(s) in each power group (a group of 24 symbols) according to the IS-95A specification. The decimated long code in the present power group determines the power bit position(s) in the following power group. For the initial power group, the Initial power bit location parameter sets the position of the power control bits. The power control bits for Rate Set I are combined before output is produced, and the punctured power control bit position values are set to zero in the data stream.

Inputs

Enabler (on top): A positive value at the top port enables the block.
Finger In: Real vector representing the demodulated data.
Long Code: Binary vector representing the decimated long code used in determining the power bit position(s) in each power group.

Outputs

Data Out: Real vector representing the demodulated data after puncturing the power bit symbols.
Power Bits: Real vector representing the power control bit for each power group.

Dialog Box

Parameters

Rate set: The rate set, either Rate Set I or Rate Set II.
Input frame size: Integer scalar that specifies the number of symbols in the Finger In input. The default value, 1, represents symbol-by-symbol demodulation.
Initial power bit location: Integer scalar that specifies the initial position of the power bit.

IS-95A Fwd Ch Interleaver/Deinterleaver IS-95A Fwd Ch Rake Demodulator