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Aliasing-Elimination Channel Estimation for CAS Reception
- Source :
- IEEE Transactions on Broadcasting. 67:934-939
- Publication Year :
- 2021
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2021.
-
Abstract
- Multimedia Broadcast Multicast Service (MBMS)-dedicated cell is a Long Term Evolution (LTE) based broadcast transmission mode with both high transmission efficiency and good compatibility with LTE unicast systems. However, since the physical design of Cell Acquisition Subframe (CAS), which is the control part of an MBMS-dedicated cell transmission period, does not take into account the long delay spread channels in Medium Tower Medium Power (MTMP) and High Tower High Power (HTHP) cells, receivers would probably suffer from multipath aliasing errors in practical transmission. This paper analyzes the impact of aliasing errors on channel estimation (CHE) accuracy and proposes an Aliasing-Elimination CHE algorithm for CAS reception. In the proposed algorithm, the pre-decoded Physical Broadcast Channel (PBCH) is reconstructed and utilized to generate a complete multipath distribution within the entire OFDM symbol length. By using this full-symbol length multipath distribution, the proposed algorithm eliminates aliasing errors effectively. Simulation results and complexity analysis show that the proposed CHE algorithm achieves a significant performance improvement compared to conventional CHE algorithms in long delay spread channels, with acceptable increment in complexity.
- Subjects :
- Transmission (telecommunications)
Orthogonal frequency-division multiplexing
Computer science
Media Technology
Data_CODINGANDINFORMATIONTHEORY
Electrical and Electronic Engineering
Aliasing (computing)
Unicast
Multimedia Broadcast Multicast Service
Algorithm
Multipath propagation
Delay spread
Communication channel
Subjects
Details
- ISSN :
- 15579611 and 00189316
- Volume :
- 67
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Broadcasting
- Accession number :
- edsair.doi...........cf3bbcf24e87ef267bac767b0da648e3