Iterative Detection with Soft Decision in Spectrally Efficient FDM Systems
نویسندگان
چکیده
In Spectrally Efficient Frequency Division Multiplexing (SEFDM) systems the input data stream is divided into several adjacent subchannels where the distance of the subchannels is less than that of Orthogonal Frequency Division Multiplexing (OFDM) systems. Since the subcarriers are not orthogonal in SEFDM systems, they lead to interference at the receiver side. In this paper, an iterative method is proposed for interference compensation for SEFDM systems. In this method a soft mapping technique is used after each iteration block to improve its performance. The performance of the proposed method is comparable to that of Sphere Detection (SD) which is a nearly optimal detection method.
منابع مشابه
A NEW MULTIPLE CRITERIA DECISION-MAKING METHOD BASED ON BIPOLAR FUZZY SOFT GRAPHS
In this research study, we present a novel frame work for handling bipolar fuzzy soft information by combining bipolar fuzzy soft sets with graphs. We introduce several basic notions concerning bipolar fuzzy soft graphs and investigate some related properties. We also consider the application of the bipolar fuzzy soft graphs. In particular, three efficient algorithms are developed to solve mult...
متن کاملA Reconfigurable Spectrally Efficient FDM Baseband Modulator
Spectrally Efficient FDM (SEFDM) systems employ non-orthogonal overlapped carriers to improve spectral efficiency for future communication systems. One of the challenges for SEFDM systems is to demonstrate efficient hardware implementations for transmitters and receivers. This paper presents the first VLSI digital baseband transmitter architecture for SEFDM. The transmitter is reconfigurable be...
متن کاملAn Overview of Optimal and sub-Optimal Detection Techniques for a Non Orthogonal Spectrally Efficient FDM
Spectrally Efficient non orthogonal Frequency Division Multiplexing (SEFDM) Systems occupy less bandwidth than equivalent orthogonal FDM (OFDM). However, enhanced spectral efficiency comes at the expense of an increased complexity in the signal detection. In this work, we present an overview of different detection techniques that trade the error performance optimality for the signal recovery co...
متن کاملIDFT Based Transmitters for Spectrally Efficient FDM System
Spectrally Efficient FDM systems (SEFDM) promise high bandwidth savings at the expense of increased complexity. In particular, SEFDM signal is generated using a bank of modulators running at the carriers' frequencies. In this paper two new methods to generate SEFDM signal based on utilizing IDFT are proposed. The methods facilitate the migration from conventional OFDM systems to SEFDM systems w...
متن کاملFPGA design considerations for non-orthogonal FDM signal detection
A fundamental resource in all communication systems and especially in wireless networks which comes at a premium is capacity. While there is a myriad of external factors influencing system capacity, one of the key issues is spectrum availability. Researchers around the globe are therefore constantly trying to invent novel spectrally efficient techniques to improve bandwidth efficiency. SEFDM is...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- CoRR
دوره abs/1304.4003 شماره
صفحات -
تاریخ انتشار 2013