APPARATUS AND METHOD FOR CONTROLLING POWERS OF ORTHOGONAL CODE SPREADING CHANNEL AND QUASI-ORTHOGONAL CODE SPREADING CHANNEL IN CDMA COMMUNICATION SYSTEM

摘要

PURPOSE: An apparatus and a method for controlling powers of an orthogonal code spreading channel and a quasi-orthogonal code spreading channel in a CDMA(Code Division Multiple Access) communication system are provided to divide channel signals spread as inter-different codes, measure each SIR(Signal to Interference Ratio), and control the powers of the channels. CONSTITUTION: The first channel generator including the first channel encoder(11), the first interleaver(13), and a multiplier(15) spreads the first data as an orthogonal code and generates the first channel signal. The second channel generator including the second channel encoder(12), the second interleaver(14), and a multiplier(16) spreads the second data as a quasi-orthogonal code and generates the second channel signal. The first gain adjuster(17) adjusts a power gain of the first channel signal. The second gain adjuster(18) adjusts a power gain of the second channel signal. A spreader including an adder(20) and a multiplier(21) adds the first and second channel signals and spreads the added signal. The controller(19) controls the power gain values of the first and second gain adjusters(17,18).