OFDM signals
Reducing the PAPR of OFDM Signals Based on SCHT Precoding
... The most popular PAPR reduction approaches can be classified into categories: the one is PAPR reduction with signal distortion, such as clippig, compandor; the other is PAPR reduction without signal distortion, such as ...
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Peak to Average Power Ratio Reduction Techniques for OFDM Signals
... of OFDM signal which has four ...of OFDM signals with large peaks is reduced by using the extra bits which are added to the original bits containing ...
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Coding to reduce the interference to carrier ratio of OFDM signals
... In this paper, we propose a simple approach to reduce the sensitivity of OFDM system to the carrier frequency offset (CFO). The main idea is to choose a well-known channel code and to rotate each coordinate by a ...
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Combined DCT and Companding for PAPR Reduction in OFDM Signals
... the OFDM signal are mod- ulated by an IFFT (inverse fast Fourier transform) after being processed with the DCT, which can reduce the PAPR of OFDM ...the OFDM signal after the IFFT ...
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FPGA implementation of a cyclostationary detector for OFDM signals
... these signals in dynamic radio ...of OFDM communications ...802.11a OFDM signals in the presence of practical radio impairments such as Carrier Frequency offset (CFO), Phase Noise, I/Q ...
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DISTANCE ESTIMATION USING OFDM SIGNALS FOR ULTRASONIC POSITIONING
... (OFDM) signals. Using OFDM signals allows the signals and their sub-carriers to remain orthogonal to each other while continuously ...ultrasonic signals). By using signals ...
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Reduction PAPR of OFDM Signals by Combining SLM with DCT Transform
... In this paper, techniques for PAPR reduction of OFDM signals have been proposed. These techniques combine the SLM technique and DCT transform. The scheme 1 is composed of DCT matrix transform followed by ...
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Reduction of Peak to Average Power Ratio of OFDM Signals by Using a Weighted OFDM Signal Scheme
... in OFDM signals is ...of OFDM signals with selected mapping technique has been ...in OFDM transmitter ...of OFDM signals can be improved with the help of SLM ...
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Reduction PAPR of OFDM Signals by Combining Grouped DCT Precoding with PTS
... of OFDM signal without signal ...precoded OFDM system can be improved due to obtaining the frequency diversity in pre- coded ...in OFDM system [6] ...
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PAPR REDUCTION OF OFDM SIGNALS USING SELECTED MAPPING
... New methods for digital transmission have developed to meet up the increasing requirement for higher data rates in communications which can be used in both wired and wireless communication. To meet out the high spectral ...
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A Base-Band Wireless Spectrum Hypervisor for Multiplexing Concurrent OFDM signals
... (i.e., OFDM modulation) processing tasks consume a lot of CPU time when 12 vPHYs are instantiated, therefore, offloading these tasks to the FPGA can increase both real-time and processing ...
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Interference Analysis of Partial Response Coded OFDM Signals
... It can be seen that the bit error rate could be reduced by 5% using this new technique and the spectral efficiency could be improved by 7%. The effect of PRC in time domain has not been analyzed previously for ...
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PAPR and PICR Reduction of OFDM Signals with Clipping Noise-based Tone Injection Scheme
... Orthogonal abundance associate multiplexing (OFDM) sicken a pointy apogee-to-average sovereignty dating (PAPR). Tone dram (TI) extends the precise fashion to many similar factors just so the above-mentioned ...
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Improved PAPR Reduction of OQAM-OFDM Signal Using Segmental PTS
... OQAM- OFDM signals into a number of segments, and then some disjoint subblocks are divided and multiplied with different phase rotation factors in each ...to OFDM systems, one of the major drawbacks ...
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An Efficient PAPR Reduction Method for LTE OFDM Systems
... The following sections propose new techniques to create alternative sequences for PTS and shows through simulation that the peak regrowth of the proposed techniques after filtering is not as severe as in traditional PTS. ...
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Comparison of PAPR Reduction Companding Techniques of OFDM Signal
... Abstract - the major drawbacks which is yet to be solved in orthogonal frequency division multiplexing (OFDM) system is its high peak-to-average power ratio (PAPR). In this paper, different companding transform ...
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Minimization of PAPR in OFDM Using SFBC
... (ACE) signals to reduce the PAPR of OFDM ...the OFDM receiver side for achieving significant bit error rate (BER) improvement with low computational ...
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Constant Envelope DCT- and FFT- based Multicarrier Systems
... combines OFDM and phase modulation to achieve: (i) constant envelope signal which allows HPA to operate near saturation level and thus maximizing power efficiency, and (ii) robust performance over multipath fading ...
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A 16PSK OFDM FSO Communication System under Complex Weather Conditions
... of OFDM modulation module, electric/optical conversion module and FSO ...of OFDM demodulation module and optical/electric conversion ...of OFDM modulation module is to transforms data bits into ...
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Application Research on Two Types of 8QAM OFDM Optical Access Signals
... 8QAM-OFDM signals is 20 dB, the relationship between the bit error rate (BER) and different optical links leng this shown in Figure ...access signals will ...access signals are lower than 10 ...
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