Analysis of Variable Bit Rate WH/CI‐Spread OFDM based Integrated Satellite‐Terrestrial Broadcast System. Issue 6 (1st April 2019)

• Record Type: Journal Article
• Authors: Agarwal, Akash; Kumar, Preetam
• Is Part Of: IET communications. Volume 13:Issue 6(2019)
• Page Start: 786
• Page End: 795
• Publication Date: 2019-04-01
• Subjects: error statistics -- channel estimation -- OFDM modulation -- mobile satellite communication -- least mean squares methods -- digital video broadcasting -- Hadamard codes -- direct broadcasting by satellite -- radiofrequency interference -- land mobile radio -- quality of service -- computational complexity; bit error rate -- spectral efficiency -- SINR expression -- three‐state Fontan land mobile satellite -- rural area terrestrial channel models -- digital video broadcast satellite handheld‐A architecture -- DVB‐SH standard -- performance measures -- channel environments -- pilot‐based channel estimation technique -- estimated error variance -- block‐wise system computational complexity -- system complexity -- closed‐form signal‐to‐interference‐noise ratio expression -- Doppler frequency shift -- minimum mean square error receiver -- integrated satellite–terrestrial broadcast system -- complex system -- performance gain -- SOFDM transmission scheme -- multicarrier spread orthogonal frequency division multiplexing transmission scheme -- variable bit rate WH‐CI‐SOFDM‐based integrated satellite‐terrestrial broadcast system -- VBR WH‐CI‐SOFDM -- Walsh Hadamard codes -- polyphase carrier interferometry code -- urban area terrestrial channel models -- VBR quality of service; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2018.5337
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : In this study, the exact closed‐form signal‐to‐interference‐noise ratio (SINR) expression, for the impact of Doppler frequency shift on minimum mean square error receiver is derived for Walsh Hadamard (WH) and polyphase carrier interferometry (CI) code based multicarrier spread orthogonal frequency division multiplexing (SOFDM) transmission scheme over integrated satellite–terrestrial broadcast system. Additionally, bit error rate and spectral efficiency are analysed based on the obtained SINR expression. To examine that, three‐state Fontan land mobile satellite, and six‐path typical urban and rural area terrestrial channel models are employed. This analysis is performed to substantiate variable bit rate (VBR) quality of service at the physical layer of digital video broadcast satellite handheld (DVB‐SH)‐A architecture, the provision of which is absent in DVB‐SH standard. VBR is assumed for SOFDM. The results illustrate that WH‐SOFDM outperforms CI‐SOFDM under both performance measures in all the three channel environments. Further, pilot‐based channel estimation technique is performed and the estimated error variance is evaluated for VBR WH/CI‐SOFDM. Later, block‐wise system computational complexity of WH/CI‐SOFDM schemes is evaluated. It is shown that, CI‐SOFDM is a relatively more complex system than WH‐SOFDM. Thus, a trade‐off is present between the achieved performance gain and system complexity.