Title :
High order non-uniform constellations for broadcasting UHDTV
Author :
Mouhouche, Belkacem ; Ansorregui, Daniel ; Mourad, Alain
Author_Institution :
R&D UK, Samsung Electron., Staines upon Thames, UK
Abstract :
This paper investigates high order NonUniform Constellations (NUC) with constellation sizes of up to 4K-QAM for broadcasting over-the-air very high data rate services such as Ultra-High Definition TV (UHDTV). An iterative algorithm is proposed for fast convergence towards the optimal NUC at each Signal-to-Noise Ratio (SNR) operating point. Performance evaluation assuming DVB-T2 as a reference shows significant gains for NUC over uniform constellations, above 1 dB for orders higher than 256-QAM, and up to 2 dB with 4K-QAM. This gain in dB converts into a relative throughput gain of nearly 10% compared to DVB-T2 using 32k FFT size with LDPC code rate 1/2.
Keywords :
digital video broadcasting; high definition television; iterative methods; parity check codes; quadrature amplitude modulation; 4K-QAM; DVB-T2; FFT; LDPC code rate; NUC; SNR operating point; UHDTV; constellation sizes; high order nonuniform constellations; iterative algorithm; over-the-air very high data rate services; signal-to-noise ratio operating point; ultra-high definition TV; Bit error rate; Digital video broadcasting; Gain; Optimization; Quadrature amplitude modulation; Signal to noise ratio; Throughput; Constellations; DVB-T2; Non-uniform QAM; UHDTV;
Conference_Titel :
Wireless Communications and Networking Conference (WCNC), 2014 IEEE
Conference_Location :
Istanbul
DOI :
10.1109/WCNC.2014.6952116
