Capacity analysis of orthogonal pulse-based TH-UWB signals
The paper studies the capacities of time hopping ultra wideband (TH-UWB) systems by adopting orthogonal pulse-based modulation schemes in a multipath environment with the consideration of multiple access interference (MAI) and inter symbol interference (ISI). Recently, orthogonal pulse-based modulat...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/85062 http://hdl.handle.net/10220/11689 |
| _version_ | 1824456363146739712 |
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| author | Majhi, Sudhan. Richardson, Paul. |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Majhi, Sudhan. Richardson, Paul. |
| author_sort | Majhi, Sudhan. |
| collection | NTU |
| description | The paper studies the capacities of time hopping ultra wideband (TH-UWB) systems by adopting orthogonal pulse-based modulation schemes in a multipath environment with the consideration of multiple access interference (MAI) and inter symbol interference (ISI). Recently, orthogonal pulse-based modulation schemes such as pulse shape modulation (PSM), biorthogonal PSM (BPSM) and the combination of orthogonal pulse position modulation (OPPM) and BPSM have been proposed for UWB system to reduce ISI and MAI. In this paper, we first investigate the influences of ISI and MAI on the capacities of TH-UWB systems in terms of signal-to-interference and noise ratio (SINR) for high-order modulation schemes based on various sets of orthogonal pulses. How mutual information varies with the number of multipath components (MPCs) is then analyzed. The complete mathematical analysis and simulation results are provided in detail. When maximizing the mutual information, the Gaussian distribution approximate is assumed to describe the characteristics of MAI and ISI. Simulation results are provided to verify the theoretical analysis. Some conclusions are drawn thereafter, such as that capacity depends on the pulse patterns adopted and mutual information varies with inversely proportional to the number of MPCs. We also observed that the capacities of UWB systems for OPPM-BPSM schemes are larger than those of PSM and BPSM schemes. |
| first_indexed | 2025-02-19T03:52:54Z |
| format | Journal Article |
| id | ntu-10356/85062 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:52:54Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/850622020-03-07T13:57:24Z Capacity analysis of orthogonal pulse-based TH-UWB signals Majhi, Sudhan. Richardson, Paul. School of Electrical and Electronic Engineering The paper studies the capacities of time hopping ultra wideband (TH-UWB) systems by adopting orthogonal pulse-based modulation schemes in a multipath environment with the consideration of multiple access interference (MAI) and inter symbol interference (ISI). Recently, orthogonal pulse-based modulation schemes such as pulse shape modulation (PSM), biorthogonal PSM (BPSM) and the combination of orthogonal pulse position modulation (OPPM) and BPSM have been proposed for UWB system to reduce ISI and MAI. In this paper, we first investigate the influences of ISI and MAI on the capacities of TH-UWB systems in terms of signal-to-interference and noise ratio (SINR) for high-order modulation schemes based on various sets of orthogonal pulses. How mutual information varies with the number of multipath components (MPCs) is then analyzed. The complete mathematical analysis and simulation results are provided in detail. When maximizing the mutual information, the Gaussian distribution approximate is assumed to describe the characteristics of MAI and ISI. Simulation results are provided to verify the theoretical analysis. Some conclusions are drawn thereafter, such as that capacity depends on the pulse patterns adopted and mutual information varies with inversely proportional to the number of MPCs. We also observed that the capacities of UWB systems for OPPM-BPSM schemes are larger than those of PSM and BPSM schemes. 2013-07-17T04:04:11Z 2019-12-06T15:56:25Z 2013-07-17T04:04:11Z 2019-12-06T15:56:25Z 2012 2012 Journal Article Majhi, S., & Richardson, P. (2012). Capacity Analysis of Orthogonal Pulse-Based TH-UWB Signals. Wireless Personal Communications, 64(2), 255-272. 0929-6212 https://hdl.handle.net/10356/85062 http://hdl.handle.net/10220/11689 10.1007/s11277-010-0196-0 en Wireless personal communications © 2010 Springer Science+Business Media, LLC. |
| spellingShingle | Majhi, Sudhan. Richardson, Paul. Capacity analysis of orthogonal pulse-based TH-UWB signals |
| title | Capacity analysis of orthogonal pulse-based TH-UWB signals |
| title_full | Capacity analysis of orthogonal pulse-based TH-UWB signals |
| title_fullStr | Capacity analysis of orthogonal pulse-based TH-UWB signals |
| title_full_unstemmed | Capacity analysis of orthogonal pulse-based TH-UWB signals |
| title_short | Capacity analysis of orthogonal pulse-based TH-UWB signals |
| title_sort | capacity analysis of orthogonal pulse based th uwb signals |
| url | https://hdl.handle.net/10356/85062 http://hdl.handle.net/10220/11689 |
| work_keys_str_mv | AT majhisudhan capacityanalysisoforthogonalpulsebasedthuwbsignals AT richardsonpaul capacityanalysisoforthogonalpulsebasedthuwbsignals |