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In this paper, we propose smart step closed-loop power control (SSPC) algorithm in a direct sequence-code division multiple access (DS-CDMA) receiver in the presence of frequency-selective Rayleigh fading. This receiver consists of three stages. In the first stage, with constrained least mean squared (CLMS) algorithm, the desired users' signal in an arbitrary path is passed and the inter-path interference...
Most of the current spectrum sensing methods detect primary transmitters while in proactive spectrum sensing the goal is to avoid interfering with primary receivers. In a proactive spectrum sensing approach, cognitive radio (CR) detects whether a primary receiver (PR) is within the coverage or interference range of the CR. Recent studies on spectrum sensing for CR reveal that sensing based on single...
Power control is one of the major parts of cellular communication system. The power control helps maintain quality of service of the communication link. In this paper, a simple proportional integral (PI) control is used in the Code Division Multiple Access (CDMA) radio system to maintain the signal to noise ratio (SNR) around a desired level under channel fading environment with multiple access interference...
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