Performance Comparison of Optimised Qpsk Modulator with Msk Modulator in Vhdl
Prof. P. Subba Rao1, V. Geetanjali2, N. Durga Naga Lakshmi3

1Prof. P. SubbaRao, Department of ECE, S.R.K.R. Engineering College, Bhimavaram (Andhra Pradesh), India.
2V. Geetanjali, Department of ECE, S.R.K.R. Engineering College, Bhimavaram (Andhra Pradesh), India.
3N. Durga Naga Lakshmi, Department of ECE, S.R.K.R. Engineering College, Bhimavaram (Andhra Pradesh), India.
Manuscript received on 01 May 2019 | Revised Manuscript received on 15 May 2019 | Manuscript published on 30 May 2019 | PP: 1753-1756 | Volume-8 Issue-7, May 2019 | Retrieval Number: F4042048619/19©BEIESP
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Abstract: Quadrature PSK (QPSK) modulation is a prevalent and well spread digital modulation technique. QPSK Modulator was implemented using the CORDIC algorithm with reduction in area and delay than other conventional QPSK modulators. The main problem encountered with QPSK modulator is that phase continuity is not maintained. This problem is removed in another modulation technique called Minimum Shift Keying (MSK). The performance comparison between CORDIC based QPSK modulator and MSK modulator is done which led to the enhancement of some parameters such as area and delay which decide the performance of modulator. The design of both of these modulation techniques were implemented using Xilinx ISE software version 14.5 in VHDL using the Spartan 3E starter kit device.
Keyword: CORDIC, Cosine, Minimum Shift Keying, Quadrature PSK, Sine.
Scope of the Article: Performance Evaluation of Networks.