Soft Estimates for Doubly Iterative Decoding with 8-PSK and 16-PSK Modulations
-
Ana-Mirela Rotopănescu
,
Lucian Trifina
Abstract
The paper addresses the doubly iterative decoding of space-time turbo codes with a large number of transmit and receive antennas. In the doubly iterative scheme, the decoder uses preliminary soft values of the coded symbols and the soft estimates only for Quadratic-Phase-Shift-Keying (QPSK) modulation have been determined. In this paper we propose and explain the soft estimates related to the signal constellations for 8-PSK and 16-PSK modulations. The coding gains, given in dB, have been determined through simulations for two situations: without double iterations and for doubly iterative decoding for a number of 1 and 4 iterations, using 16 transmit and receive antennas, respectively showing the compromise between the spectral efficiency and the coding gain.
©2012 by Walter de Gruyter Berlin Boston
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Articles in the same Issue
- Masthead
- Radiation performance of Circularly Polarized Broadband Gap Coupled Elliptical Patch Antenna
- A Novel Balanced Amplifier Based on HMSIW Coupler
- Effects of Dielectric Values and Substrate Materials on Electromagnetic (EM) Absorption in Human Head
- A Low Voltage High Gain Transformer Noise-Canceling Current Mode Ultrawideband CMOS Low Noise Amplifier
- A Novel Current-Mode Differential Transconductance LNA for IEEE 802.11a Application
- Analytical Derivation of 2×2 MIMO Channel Capacity in Terms of Multipath Angle Spread and Signal Strength
- Soft Estimates for Doubly Iterative Decoding with 8-PSK and 16-PSK Modulations
- Multiple Co-Channel Interferers Influence on Selection Combining over Correlated Weibull Fading Channels
