JELE_V4_N1_RP2 Hirald Dwaraka Praveena C. Subhas Padmaja Nimmagadda Journal on Electronics Engineering 2249 – 0760 4 1 18 23 Error Correction Codes, Demodulation, Digital Communication, Bit-error Rate Hirald Dwaraka Praveena et.al proposed a M-QAM scheme for achieving spectral efficiency of high order modulation. For low complexity decoding, low cost and low bit-error rate LDPC (Low-Density Parity-Check) codes are chosen using encoding and decoding methods. Error Correcting Codes (ECCs) are determined for detecting and correcting errors for increasing the system throughput, speed and reducing power consumption. The simulated results are more reliable compared to Turbo codes. September – November 2013 Copyright © 2013 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=2511