Diversity-combining receiver for FFH/FSK systems over partial-band noise jamming and AWGN channels
In this report, bit-error-rate (BER) performance of a fast frequency-hopped frequency-shift-keying (FFH/FSK) system utilizing diversity-combining over a partial-band jamming (PBJ), additive white Gaussian noise (AWGN) and fading channel is studied. BER simulation is conducted for three diversity-com...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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2009
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| Online Access: | http://hdl.handle.net/10356/17294 |
| _version_ | 1826110583568596992 |
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| author | Quah, Royston Wee Long. |
| author2 | Teh Kah Chan |
| author_facet | Teh Kah Chan Quah, Royston Wee Long. |
| author_sort | Quah, Royston Wee Long. |
| collection | NTU |
| description | In this report, bit-error-rate (BER) performance of a fast frequency-hopped frequency-shift-keying (FFH/FSK) system utilizing diversity-combining over a partial-band jamming (PBJ), additive white Gaussian noise (AWGN) and fading channel is studied. BER simulation is conducted for three diversity-combining methods, namely, hard-decision combining, square-law linear combining and product combining.
In a PBJ channel, the three diversity-combining methods are able to improve BER performance especially with high diversity level, L. However, this is only true beyond certain signal-to-jammer ratio (SJR) level. In the case of a channel with PBJ and AWGN, with the signal-to-noise ratio (SNR) fixed at 13.35dB, both hard-decision combining and product combining are able to provide improvement to BER for low diversity level and for a small range of SJR levels. However, no improvement is observed for system employing square-law linear combining when diversity level is increased.
The three diversity-combining methods are able to improve the BER performance under both Rayleigh and Rician-fading channels with PBJ and AWGN. In addition our study also shows that there exists an optimum L under the conditions specified in this report. Comparing the effects of non-fading, Rician-fading and Rayleigh-fading channels, our studies have also shown that the system performance is the best under a non-fading channel due to the absence of signal attenuation caused by fading. On the other hand, the system performance under a Rician-fading channel is better than that of a Rayleigh-fading channel due to the presence of a dominant line-of-sight component.
Among the three diversity-combining methods, the product-combining scheme is able to outperform the hard-decision and square-law linear-combining methods under most conditions specified in this report. Thus, the product-combining scheme is recommended to be used for most practical applications. |
| first_indexed | 2024-10-01T02:36:51Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/17294 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:36:51Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | ntu-10356/172942023-07-07T15:43:18Z Diversity-combining receiver for FFH/FSK systems over partial-band noise jamming and AWGN channels Quah, Royston Wee Long. Teh Kah Chan School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Wireless communication systems In this report, bit-error-rate (BER) performance of a fast frequency-hopped frequency-shift-keying (FFH/FSK) system utilizing diversity-combining over a partial-band jamming (PBJ), additive white Gaussian noise (AWGN) and fading channel is studied. BER simulation is conducted for three diversity-combining methods, namely, hard-decision combining, square-law linear combining and product combining. In a PBJ channel, the three diversity-combining methods are able to improve BER performance especially with high diversity level, L. However, this is only true beyond certain signal-to-jammer ratio (SJR) level. In the case of a channel with PBJ and AWGN, with the signal-to-noise ratio (SNR) fixed at 13.35dB, both hard-decision combining and product combining are able to provide improvement to BER for low diversity level and for a small range of SJR levels. However, no improvement is observed for system employing square-law linear combining when diversity level is increased. The three diversity-combining methods are able to improve the BER performance under both Rayleigh and Rician-fading channels with PBJ and AWGN. In addition our study also shows that there exists an optimum L under the conditions specified in this report. Comparing the effects of non-fading, Rician-fading and Rayleigh-fading channels, our studies have also shown that the system performance is the best under a non-fading channel due to the absence of signal attenuation caused by fading. On the other hand, the system performance under a Rician-fading channel is better than that of a Rayleigh-fading channel due to the presence of a dominant line-of-sight component. Among the three diversity-combining methods, the product-combining scheme is able to outperform the hard-decision and square-law linear-combining methods under most conditions specified in this report. Thus, the product-combining scheme is recommended to be used for most practical applications. Bachelor of Engineering 2009-06-05T06:08:15Z 2009-06-05T06:08:15Z 2009 2009 Final Year Project (FYP) http://hdl.handle.net/10356/17294 en Nanyang Technological University 78 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering::Wireless communication systems Quah, Royston Wee Long. Diversity-combining receiver for FFH/FSK systems over partial-band noise jamming and AWGN channels |
| title | Diversity-combining receiver for FFH/FSK systems over partial-band noise jamming and AWGN channels |
| title_full | Diversity-combining receiver for FFH/FSK systems over partial-band noise jamming and AWGN channels |
| title_fullStr | Diversity-combining receiver for FFH/FSK systems over partial-band noise jamming and AWGN channels |
| title_full_unstemmed | Diversity-combining receiver for FFH/FSK systems over partial-band noise jamming and AWGN channels |
| title_short | Diversity-combining receiver for FFH/FSK systems over partial-band noise jamming and AWGN channels |
| title_sort | diversity combining receiver for ffh fsk systems over partial band noise jamming and awgn channels |
| topic | DRNTU::Engineering::Electrical and electronic engineering::Wireless communication systems |
| url | http://hdl.handle.net/10356/17294 |
| work_keys_str_mv | AT quahroystonweelong diversitycombiningreceiverforffhfsksystemsoverpartialbandnoisejammingandawgnchannels |