Home / How to reduce the bit error rate of OFDM
For this, numerous techniques are proposed to beat the PAPR problem like i) Selective mapping (SLM) ii) Partial transmit sequence (PTS), iii) Clipping, iv) Clipping and filtering. Current technological objectives for OFDM focus primarily on optimizing bit error rate (BER) performance, particularly in high-data-rate applications where transmission reliability directly impacts user experience. However, one amongst the foremost drawbacks of the OFDM system is that the high-peak-to-average power ratio (PAPR) that leads the system to provide in-band distortion and out-of-band radiation and reduces its efficiency. OFDM can be implemented easily, it is spectrally efficient and can provide high data rates with sufficient robustness to channel imperfections. Abstract-In this paper we present an analytical approach to evaluate the bit error rate (BER) of OFDM systems subject to carrier frequency offset (CFO) and channel estimation error in Rayleigh flat fading as well as in time and frequency selective fading channels.
Abstract: Orthogonal frequency division multiplexing (OFDM-IM) is a multicarrier transmission technology that modulates information bits not just onto subcarriers by means of M-ary
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Although OFDM, orthogonal frequency division multiplexing is more complicated than earlier forms of signal format, it provides some distinct advantages in terms of data transmission, especially where
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introduced by the underwater c hannel. Keywords: Channel coding, P-LDPC, OFDM, underwater, polar code, bit error rate.
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filtering approachsuccessfully reduces bit error rate. DPSS technique is an channel estimation based technique which is sed to give optimum BER performance of the OFDM System. DPSS (Discrete
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A low-rate data stream modulates each orthogonal carrier in the OFDM system, which divides the spectrum into many of them. It will be possible to utilize the spectrum more efficiently than
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Orthogonal Frequency Division Multiplexing (OFDM) as the standard multicarrier technique in 5G suffers from the out-of-band (OOB) leakage where using the filter-based multicarrier
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Due to multipath, phase errors occur in the channel,which causes distorted result at the output of the receiver.Therefore, a need is raised to calculate BER due to phase errors using BPSK which has
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LTE also offers faster data rate transfer which in higher download and upload rate, When the rates is increase, it will also reduce the problem of lagging in internet connection. This system uses
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Therefore, it''s highly desirable to cut back the PAPR of an OFDM signal. For this, numerous techniques are proposed to beat the PAPR problem like i) Selective mapping (SLM) ii) Partial transmit sequence
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The probability of bit errors p b on the receiver of the OFDM communication system depends on the set of SNR values on the active subcarriers.
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Tools are provided for bit error rate analysis, generating eye and constellation diagrams, and visualizing channel characteristics. The system toolbox also provides adaptive algorithms that let you model
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If the noise level is high then a single impulse will be able to cause errors in all carriers of an OFDM symbol, having shorter symbols means less carriers and lower errors.
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In this work, Discrete Wavelet Packet Transform (DWPT) has been studied extensively, and a new structure for DWPT-OFDM that is based on FFT and Sliding Window is proposed, a new scheme,
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To mitigate these shortcomings, in this paper, a hybrid scheme is proposed that combines nonlin-ear companding techniques (NCT) with other precoding schemes—discrete cosine transform (DCT),
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In this letter, we derive the closed-form analytical expressions for the exact Bit Error Rate (BER) of Physical Layer Network Coding (PNC) systems considering M-ary Quadrature Amplitude Modulation
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Therefore, it is highly desirable to reduce the PAPR of an OFDM signal. For this, numerous techniques have been proposed to overcome the PAPR problem such as i) selective
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This paper investigates the bit-error-rate (BER) performance of linear, spline and piecewise cubic Hermite interpolating polynomial (PCHIP) interpolation methods in LS channel estimation over the
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The clipping is the simplest PAPR reduction and of high commercial value . The method is done by setting a fixed threshold. When the OFDM signal amplitude is higher than the
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Various techniques can be employed to reduce bit error rates in OFDM systems. These include advanced signal processing algorithms, error correction coding, and adaptive modulation
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Abstract-In this paper we present an analytical approach to evaluate the bit error rate (BER) of OFDM systems subject to carrier frequency offset (CFO) and channel estimation error in Rayleigh flat fading
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Furthermore, OFDM index modulation (OFDM-IM) has been proposed in recent literature as a multi-carrier transmission scheme that modulates symbol
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To mitigate these shortcomings, in this paper, a hybrid scheme is proposed that combines nonlinear companding techniques (NCT) with other precoding schemes—discrete cosine transform
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The purpose of this paper is to use a Matlab simulation of OFDM to analyse the Bit Error Ratio (BER) of a transmission varies when Signal to Noise Ratio (S/N Ratio) and Multipropagation effects are
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However, one amongst the foremost drawbacks of the OFDM system is that the high-peak-to-average power ratio (PAPR) that leads the system to provide in-band distortion and out-of-band radiation and
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Therefore, the D3 would be particularly suitable for non-orthogonal multiple access (NOMA) because relaxing the dependence on the estimated CSI can improve the reliability of the detection process
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In this section the bit error rates of OFDM systems with car- rier frequency offset and channel estimation error in frequency selective fading channels are derived.
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Orthogonal frequency-division multiplexing (OFDM) is a method of data transmission where a single information stream is split among several closely
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The main idea behind OFDM is the so called Multi Carrier Modulation (MCM) transmission technique. MCM is the principle of transmitting data by dividing the input bit stream into several parallel bit
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