Proceedings ArticleDOI
Iterative Receiver Technique for Reduced-CP, Reduced-PMEPR OFDM Transmission
P. Torres,A. Gusmao +1 more
- pp 1981-1985
TLDR
A new iterative receiver technique is proposed, which can cancel both the nonlinear distortion effects and the interblock interference effects, through a modified iterative decision-feedback procedure, simultaneously providing the appropriate CP reconstruction effects.Abstract:
When a low-PMEPR (peak-to-mean envelope power ratio) is intended for OFDM (orthogonal frequency division multiplexing) transmission, a well known solution is to resort to signal processing schemes that involve nonlinear operations (e.g., an appropriate clipping) in the time domain. In this paper, where we consider an OFDM-based transmission under a deliberate nonlinear distortion and a complementary frequency-domain filtering, we assume that the length of the cyclic prefix (CP) is below the channel memory order. In this context, a new iterative receiver technique is proposed, which can cancel both the nonlinear distortion effects and the interblock interference effects, through a modified iterative decision-feedback procedure, simultaneously providing the appropriate CP reconstruction effects. A set of performance results is used to show the practical interest of the proposed approach for power/bandwidth efficient OFDM-based block transmission.read more
Citations
More filters
Journal ArticleDOI
Interference Suppression for OFDM Systems With Insufficient Guard Interval Using Null Subcarriers
TL;DR: A new frequency domain equalizer to suppress channel induced interference such as ICI and ISI, co-channel interference, and overlaid systems interference by exploiting null subcarriers inherent in standard multicarrier systems.
Journal ArticleDOI
A CP Reduction Scheme Based on Symbol Repetition for Narrow-Band IoT Systems
TL;DR: A novel waveform with low cyclic prefix (CP) overhead for narrow-band Internet-of-things (NB-IoT) systems and it is proved that the proposed SR-OFDM can effectively fight against the multipath fading channels by a simple single-tap equalization, avoiding the mutual interference among symbols.
Journal ArticleDOI
Reduction of Cyclic Prefix Overhead in Narrow-Band Internet of Things (NB-IoT) Systems
TL;DR: A versatile CP-free repetition scheme, where all CP overheads are remove when symbols are repeatedly transmitted in the approach, to remedy the issue of degenerated spectral efficiency in orthogonal frequency division multiplexing systems.
Proceedings ArticleDOI
On Power/Bandwidth Efficient Clipped-OFDM and SC/FDE Transmission Schemes with Reduced CP Overhead
P. Torres,Antonio Gusmao +1 more
TL;DR: Results show that the benefits of a reduced CP to those of a reducing PMEPR can be added through the use of the proposed iterative receiver techniques, thereby providing a highly power/bandwidth efficient block transmission, with both clipped-OFDM and SC/FDE schemes.
Journal ArticleDOI
Investigating the relation between optimum guard interval and channel delay spread for a MC-CDMA system
Cetin Kurnaz,Hulya Gokalp +1 more
TL;DR: In this article, an approach to determine the optimum guard interval for a multicarrier code division multiple access (MC-CDMA) system is presented. But the work is limited to a single channel.
References
More filters
Book
OFDM for Wireless Multimedia Communications
Richard van Nee,Ramjee Prasad +1 more
TL;DR: In this paper, the authors present a comprehensive introduction to OFDM for wireless broadband multimedia communications and provide design guidelines to maximize the benefits of this important new technology, including modulation and coding, synchronization, and channel estimation.
Journal ArticleDOI
Frequency domain equalization for single-carrier broadband wireless systems
TL;DR: This article surveys frequency domain equalization (FDE) applied to single-carrier (SC) modulation solutions and discusses similarities and differences of SC and OFDM systems and coexistence possibilities, and presents examples of SC-FDE performance capabilities.
Book
Turbo Codes: Principles and Applications
Branka Vucetic,Jinhong Yuan +1 more
TL;DR: This chapter discusses Turbo Coding Performance Analysis and Code Design, which focuses on Turbo Trellis Coded Modulation Schemes, and applications of Turbo Codes.
Journal ArticleDOI
Maximum-likelihood detection of nonlinearly distorted multicarrier symbols by iterative decoding
TL;DR: The proposed method can be used to reduce the peak-to-average power ratio of multicarrier signals by clipping the transmit sequence and to correct any nonlinear distortion present in transmitter/receiver amplifiers that are operating close to saturation.
Proceedings ArticleDOI
An analysis of orthogonal frequency-division multiplexing for mobile radio applications
TL;DR: Using static and time-varying channel impulse responses, the authors analyze the performance of orthogonal frequency-division multiplexing on multipath fading channels and show that, provided it employs a frequency domain equalizer, single-carrier transmission substantially outperforms OFDM signalling.
Related Papers (5)
Low-PMEPR OFDM transmission with an iterative receiver technique for cancellation of nonlinear distortion
A. Gusmao,Rui Dinis,P. Torres +2 more