Proposed Title :

Low Power FPGA Implementation of A Low Complexity QAM-QPSK modulation and Demodulation with Imbalance Calibration method

Improvement of this Project:

• • To design a Digital Quadrature Amplitude Modulator in phase shift keying method of QAM – QPSK in 4, 8, 16 Quadrant in VHDL with synthesized in Xilinx FPGA S6LX9-2FG144.

  • To design QAM-QPSK Demodulation with tested Bit error rate.

  • To reduced the imbalance Calibration, extractions and phase mismatches in this design.

Software implementation:

• Modelsim
• Xilinx 14.2

Proposed System:

In a recent technology of digital and analog signal processing applications will have lot of interference will occurs due to signal transmission traffic in air medium, thus transmission and reception of any RF signal will have more interference, calibration, jitter noise in reception part. In this digital modulation and demodulation technique of Quadrature transmission will have I/Q based differential signal method to reduced this calibration imbalance but some error will occur in gain and phase mismatches on high frequency range transmission, due to this problem, here the proposed work will designed a Quadrature amplitude modulation in phase shift keying method of QAM-QPSK modulation and demodulation in 4, 8, 16 quadrant in differential signal processing with using technique of digital frequency calibration with carrier signal generation. This method is fully design with digital quadrature method in FPGA with using VHDL, these output will measure in the extraction, calibration of gain and phase mismatch and also verified in the compared terms of bit error rate, area, delay and power with using Xilinx FPGA S6LX9-2FG144.

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A Low Complexity I/Q Imbalance Calibration Method for Quadrature Modulator

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