A survey on advanced transmission technologies for high bandwidth and good signal quality for high-speed railways

Abstract

Ahigh-speedrailway (HSR) has gained very high popularity for passengersdue to the fast, reliable, economical and convenient during traveling a verylong-distance journey. Thedemandfor advancedbroadbandservices such aswatching4K movies, cloud computing andonline gaming, has exponentiallyincreased fortravelerson thehigh-speedtrain(HST).The HSTcan’t providegood bandwidth to facilitate these services for travelers via existingtechnologies such as cellular networksand satellite networks because offrequent handoffs, high penetration and fading.So, the bandwidth degradesdramatically due to these issues. Research workers have developed proposalsto handle these problems by advanced transmission technologies for HSR.Until now,varioustransmissionschemeshave beensuggestedby researchworks with thefocusfor either high bandwidth or signal qualityimprovement. This paper presents a survey on advanced transmissiontechnologies for high bandwidth and good signal quality. In this paper, acomprehensive survey of the appropriate literature published that concentrateon advanced transmission methods in HSR communications in getting higherbandwidth efficiency and maximize the signal quality is presented. Advancedtransmission method can be categorized into orthogonal frequencydivisionmultiplexing (OFDM), multiple-input multiple-output (MIMO) and radio-over-fiber (RoF).

Orthogonal frequency division multiplexing system with an indexed-pilot channel estimation

“…where the vector 𝒔 is a column vector representing the data symbols after pilot-symbols insertion and serialto-parallel conversion, 𝒔 𝑑 = [𝑠 𝒅 (1), 𝑠 𝒅 ( 2…”

“…Orthogonal frequency division multiplexing (OFDM) is a multi-carrier modulation technique widely implemented in broadband wireless communication systems such as long-term evolution (LTE) and all of the most recent Wi-Fi standards due to its high spectral efficiency and robustness when operating in frequency selective fading environments [1]. On the other hand, erroneous channel estimation is a crucial issue for wireless communication systems operating in frequency-selective fading channels, since channel-estimation errors might lead to considerable performance loss [2].…”

Studying the effect of changing Input conditions on MMF using MGDM technique

“…It is shown that it can get wide-band facility by using different channels of the OTDM system. The second one, which is used the orthogonal frequency division multiplexing (OFDM), MIMO, and radio over-fiber (ROF) as reported in [14]. This work focused on improving the signal transmitted quality using three above technologies.…”

MOCAB/HEFT algorithm of multi radio wireless communication improved achievement assessment

“…In comparison to other algorithms, the findings of the algorithms primary domain controller (PDC) and direct cable connection (DCC) show a greater success rate and cost effectiveness. A resource provisioning technique was presented to help hybrid cloud infrastructures meet the deadline demands of dataintensive applications [30]. The task scheduling literature review is presented in Table 1.…”