Efficient and Robust Detection of GFSK Signals under Dispersive Channel, Modulation Index, and Carrier Frequency Offset Conditions
Gaussian frequency shift keying is the modulation scheme specified for Bluetooth. Signal adversities typical in Bluetooth networks include AWGN, multipath propagation, carrier frequency, and modulation index offsets. In our effort to realise a robust but efficient Bluetooth receiver, we adopt a high...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2005-09-01
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| Series: | EURASIP Journal on Advances in Signal Processing |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1155/ASP.2005.2719 |
| _version_ | 1811230880144818176 |
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| author | Stephan Weiss Charles Tibenderana |
| author_facet | Stephan Weiss Charles Tibenderana |
| author_sort | Stephan Weiss |
| collection | DOAJ |
| description | Gaussian frequency shift keying is the modulation scheme specified for Bluetooth. Signal adversities typical in Bluetooth networks include AWGN, multipath propagation, carrier frequency, and modulation index offsets. In our effort to realise a robust but efficient Bluetooth receiver, we adopt a high-performance matched-filter-based detector, which is near optimal in AWGN, but requires a prohibitively costly filter bank for processing of K bits worth of the received signal. However, through filtering over a single bit period and performing phase propagation of intermediate results over successive single-bit stages, we eliminate redundancy involved in providing the matched filter outputs and reduce its complexity by up to 90% (for K=9). The constant modulus signal characteristic and the potential for carrier frequency offsets make the constant modulus algorithm (CMA) suitable for channel equalisation, and we demonstrate its effectiveness in this paper. We also introduce a stochastic gradient-based algorithm for carrier frequency offset correction, and show that the relative rotation between successive intermediate filter outputs enables us to detect and correct offsets in modulation index. |
| first_indexed | 2024-04-12T10:35:31Z |
| format | Article |
| id | doaj.art-158e5d645fa34c37af6ddb786478206c |
| institution | Directory Open Access Journal |
| issn | 1687-6172 1687-6180 |
| language | English |
| last_indexed | 2024-04-12T10:35:31Z |
| publishDate | 2005-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | EURASIP Journal on Advances in Signal Processing |
| spelling | doaj.art-158e5d645fa34c37af6ddb786478206c2022-12-22T03:36:43ZengSpringerOpenEURASIP Journal on Advances in Signal Processing1687-61721687-61802005-09-012005162719272910.1155/ASP.2005.2719Efficient and Robust Detection of GFSK Signals under Dispersive Channel, Modulation Index, and Carrier Frequency Offset ConditionsStephan WeissCharles TibenderanaGaussian frequency shift keying is the modulation scheme specified for Bluetooth. Signal adversities typical in Bluetooth networks include AWGN, multipath propagation, carrier frequency, and modulation index offsets. In our effort to realise a robust but efficient Bluetooth receiver, we adopt a high-performance matched-filter-based detector, which is near optimal in AWGN, but requires a prohibitively costly filter bank for processing of K bits worth of the received signal. However, through filtering over a single bit period and performing phase propagation of intermediate results over successive single-bit stages, we eliminate redundancy involved in providing the matched filter outputs and reduce its complexity by up to 90% (for K=9). The constant modulus signal characteristic and the potential for carrier frequency offsets make the constant modulus algorithm (CMA) suitable for channel equalisation, and we demonstrate its effectiveness in this paper. We also introduce a stochastic gradient-based algorithm for carrier frequency offset correction, and show that the relative rotation between successive intermediate filter outputs enables us to detect and correct offsets in modulation index.http://dx.doi.org/10.1155/ASP.2005.2719Gaussian frequency shift keyingBluetoothconstant modulus algorithmcarrier frequency offset correctionmodulation index offset correction. |
| spellingShingle | Stephan Weiss Charles Tibenderana Efficient and Robust Detection of GFSK Signals under Dispersive Channel, Modulation Index, and Carrier Frequency Offset Conditions EURASIP Journal on Advances in Signal Processing Gaussian frequency shift keying Bluetooth constant modulus algorithm carrier frequency offset correction modulation index offset correction. |
| title | Efficient and Robust Detection of GFSK Signals under Dispersive Channel, Modulation Index, and Carrier Frequency Offset Conditions |
| title_full | Efficient and Robust Detection of GFSK Signals under Dispersive Channel, Modulation Index, and Carrier Frequency Offset Conditions |
| title_fullStr | Efficient and Robust Detection of GFSK Signals under Dispersive Channel, Modulation Index, and Carrier Frequency Offset Conditions |
| title_full_unstemmed | Efficient and Robust Detection of GFSK Signals under Dispersive Channel, Modulation Index, and Carrier Frequency Offset Conditions |
| title_short | Efficient and Robust Detection of GFSK Signals under Dispersive Channel, Modulation Index, and Carrier Frequency Offset Conditions |
| title_sort | efficient and robust detection of gfsk signals under dispersive channel modulation index and carrier frequency offset conditions |
| topic | Gaussian frequency shift keying Bluetooth constant modulus algorithm carrier frequency offset correction modulation index offset correction. |
| url | http://dx.doi.org/10.1155/ASP.2005.2719 |
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