An interference suppressing OFDM system for wireless communications
نویسندگان
چکیده
The Orthogonal Frequency Division Multiplexed (OFDM) system introduced here, termed Interference Suppressing OFDM (IS-OFDM), has the capabilities of suppressing narrow-band interference in wide band wireless applications. The IS-OFDM encodes each transmitted symbol in all frequency bins. Each frequency bin will then “contain” all transmitted symbols which are distinguished and separated from each other by orthogonal Hadamard sequences. The IS-OFDM can provide a pointto-point wireless link without spreading the incoming data rate. In addition, the IS-OFDM has all the advantages of the ordinary OFDM which is, as shown, a special case of the IS-OFDM. In this article we present the IS-OFDM system design and evaluate its performance in the presence of narrow-band interference and AWGN channel.
منابع مشابه
Quadrature Amplitude Modulation All Optical Orthogonal Frequency Division Multiplexing-dense Wavelength Division Multiplexing-optical Wireless Communication System under Different Weather Conditions
This paper proposes an analytical model for evaluating the performance of dense wavelength division multiplexing (DWDM) for all optical orthogonal frequency division multiplexing (AO-OFDM) optical wireless channel. The investigated performance for proposed system is evaluated for the parameters bit error rate (BER) and Q factor .The constellation diagrams, and bit error rate (BER) of the recei...
متن کاملFPGA Synthesis of VHDL OFDM System
This paper presents a novel Field Programmable Gate Array (FPGA) technique to gain approach in the problem of OFDM system implementation. The actual and next communication schemes tend to use OFDM systems in order to provide high baud rates, less intercarrier interference (IC), and less intersymbol interference (ISI). Some examples are IEEE-802.11, IEEE-802.15, IEEE-802.16, 3GPP, MC-CDMA, digit...
متن کاملA Cyclic Prefix OFDM System with BPSK Modulation
Orthogonal Frequency Division Multiplexing (OFDM) is a promising technique for high data rate wireless communications because it can combat inter-symbol interference caused by the dispersive fading of wireless channels. A FDM channel is like water flow out of a faucet, in contrast the OFDM signal is like a shower. In a faucet all water comes in one big stream and cannot be subdivided. OFDM show...
متن کاملBounding performance and suppressing intercarrier interference in wireless mobile OFDM
While rapid variations of the fading channel cause intercarrier interference (ICI) in orthogonal frequency-division multiplexing (OFDM), thereby degrading its performance considerably, they also introduce temporal diversity, which can be exploited to improve the performance. In this paper, we first derive a matched-filter bound (MFB) for OFDM transmissions over doubly selective Rayleigh fading ...
متن کاملSYSTEM DESIGN AND PERFORMANCE ANALYSIS OF ASYMMETRICALLY AND SYMMETRICALLY CLIPPED OPTICAL ( ASCO ) - OFDM FOR IM / DD OPTICAL WIRELESS COMMUNICATIONS by
SYSTEM DESIGN AND PERFORMANCE ANALYSIS OF ASYMMETRICALLY AND SYMMETRICALLY CLIPPED OPTICAL (ASCO)-OFDM FOR IM/DD OPTICAL WIRELESS COMMUNICATIONS by Nan Wu As the quantity of mobile communication devices, such as cellphones, tablets, and laptops, dramatically increase, the demand for high speed wireless service has been growing. Optical wireless communications (OWCs), which offer unlimited trans...
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:
دوره شماره
صفحات -
تاریخ انتشار 2002