<p>Filter is one of the key components of all signals processing elements. Both the FIR and IIR filter are used to reduce the unwanted signal in the original signal. Here discussing the FIR filter and design the efficient FIR filter using Dual Ripple Carry Adder (RCA) based SQRT-carry select adder (CSLA). Many components present in the FIR filter, one of the main component is Adder. Adder is used to combine the signal for avoid the noise occurring in the output. Proposed a Dual RCA based SQRT-CSLA for speed up the filtering process. The filter performance can be analyzed by Xilinx simulation environment.</p>

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<p>In any communication system transmitter and receiver are used to transmit the signal via wired or wireless channel. In the transmitter, modulation is one of the processes to transmit the signal efficiently. Likewise, receiver contains demodulation to recover the original signal from the transmitter. In general, the communication system uses one modulation/demodulation process at a time. It cannot use different modulation/demodulation within a single system. To overcome this problem reconfiguration technique is implemented. It is the method using different modulation scheme at the same time. It will increase the efficiency of the communication system. QPSK and BPSK modulation technique is used to transmit and receive the signal.</p>