An Experimental Study on Channel Estimation and Synchronization to Reduce Error Rate in OFDM Using GNU Radio

Anjana, C; Sundaresan, Sivapatham; Zacharia, Tessy; Gandhiraj, R; Soman, K P

doi:10.1016/j.procs.2015.01.017

Cited by 15 publications

(3 citation statements)

References 14 publications

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“…Software radio is a kind of radio that configures physical hardware through software programming. Software radio can obtain flexibility on the premise of an unchanged hardware platform [29]. This research makes the wireless communication system and other computer application platforms become very similar.…”

Section: Methodsmentioning

confidence: 99%

Research on data transmission system of acoustic wave while drilling based on OFDM

Zheng

Geng

2022

IET Communications

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Logging while drilling is to transmit down‐hole measurement data to the surface timely and accurately to ensure the normal production. Drilling data transmission system includes mud pulse and electromagnetic wave. The transmission rate of these methods is only tens of bits per second. To solve the problems of slow transmission rate, low accuracy and long waiting time for drilling data, an acoustic wireless communication system based on orthogonal frequency division multiplexing (OFDM) is developed. The hardware and software design of the acoustic wireless communication system has been completed, and experiments have been carried out. The communication channel is drilling fluid, a frequency selective fading channel with Gaussian white noise and obvious multipath effect. OFDM can be used to solve the adverse effects of these problems on signal transmission. Schmidl–Cox algorithm is used for signal synchronization. Error control coding adopts CRC32 algorithm. The experimental results show that the transmission rate of BPSK mapped OFDM signal can reach 250 kbit/s when the bit error rate is 10−3. Compared with the traditional wireless communication system, an acoustic wireless communication system based on drilling fluid has the advantages of high data transmission rate, low bit error rate and strong anti‐multi‐path fading ability.

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Section: Methodsmentioning

confidence: 99%

Research on data transmission system of acoustic wave while drilling based on OFDM

Zheng

Geng

2022

IET Communications

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“…The pipeline for decoding the OFDM header is first through the FFT block and respectively through the OFDM Channel Estimation, Equalizer and Serializer blocks. The Channel Estimation (Anjana, et al, 2015) block estimates the channel used and the coarse frequency offset from the preambles. Next, the Frame Equalizer block performs the equalization in one or two dimensions of the OFDM frame.…”

Section: Data Transmission Flowmentioning

confidence: 99%

Design of a Robust Orthogonal Frequency Division Multiplexing (OFDM) Transceiver for a Cognitive Radio Testbed

Bello

Edeko

2022

Nig. J. Env. Sci. & Tech.

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Primarily, a Cognitive Radio (CR) resolves the problem of spectrum scarcity and underutilization. However, it should also attain a good throughput and Quality of Service (QoS) as its objectives. These requirements are solely dependent on the modulation used. Though single carrier modulations such as Gaussian Minimum Shift Keying (GMSK) are highly spectral efficient, they are not robust to frequency selective fading. An implementation of multicarrier modulation supports high spectral efficiency and resistance to multipath fading. Therefore, in this paper, there is a comprehensive how-to-guide of the design of Orthogonal Frequency Division Multiplexing (OFDM) in cognitive radio using GNU Radio (GR) 3.8 that interfaces with Universal Software Radio Peripheral (USRP) B210s for video transmission. The implementation achieved allows for the choice of any modulation schemes out of four commonly used ones for communication of the payloads thus offering dynamism for use in a cognitive radio system. The effective implementation of the proposed methods in this paper is verified by the successful transmission and reception of a 4 minute 37 seconds MP4 video across the different choices of modulation schemes. It was observed that the error performance of the payloads degraded with higher constellation points however, the throughput was increased. Hence, the trade-off between error probability and throughput in the cognitive radio is based on the radio-scene metrics about the signal-to-noise ratio (SNR) of the available channels.

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“…Scheduler: It is created for each active flow-graph, which is based on steady stream of data flow [15] between the blocks. It is responsible for transferring data through the flow-graph.…”

Section: Signal Processing Blocks In Gnu Radiomentioning

confidence: 99%

Cognitive Radio-Modulation and Demodulation

Gummineni¹,

Polipalli²

2020

Recent Trends in Communication Networks

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The reconfigurability in Cognitive Radio (CR) facilitates to dynamically change its parameters for the efficient spectrum utilization. The motivation behind the study of cognitive radio is that the number of different radio signals can be handled without using extra circuitry, i.e., reusing identical hardware with the change in the software will reduce time to market, development cost, and upgrade infrastructure. Software Defined Radio (SDR) is an enabling technology for Cognitive Radio (CR); therefore, it emphasizes on SDR unique features, characteristics, and basics concepts that are required to understand operation of SDR. SDR allows service providers to upgrade infrastructure without unreasonable cost. Modulation techniques play a vital role in any communication systems such as cable modems, DSL modems, CDMA, 4G, Wi-Fi, and WIMAX; thus, it emphasizes on implementation of modulation techniques using SDR Generic hardware, which is operated by Open Source software called GNU Radio. Implementation of various analog and digital modulation techniques using the GNU Radio provides a way for developing advanced wireless communication system. GNU Radio software is a highly flexible signal processing platform, which makes it easy and reduces time to implement different modulation techniques with appropriate script.

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An Experimental Study on Channel Estimation and Synchronization to Reduce Error Rate in OFDM Using GNU Radio

Cited by 15 publications

References 14 publications

Research on data transmission system of acoustic wave while drilling based on OFDM

Research on data transmission system of acoustic wave while drilling based on OFDM

Design of a Robust Orthogonal Frequency Division Multiplexing (OFDM) Transceiver for a Cognitive Radio Testbed

Cognitive Radio-Modulation and Demodulation

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