Details
| Original language | English |
|---|---|
| Pages (from-to) | 123-127 |
| Number of pages | 5 |
| Journal | FREQUENZ |
| Volume | 66 |
| Issue number | 5-6 |
| Early online date | 10 May 2012 |
| Publication status | Published - 11 May 2012 |
| Externally published | Yes |
Abstract
Equalization of broadband signals can be efficiently realized in frequency domain. One prominent example is the orthogonal frequency division multiplexing (OFDM) transmission technique. With the introduction of a cyclic prefix and a modulation onto orthogonal subcarriers the equalization can be performed in frequency domain with one tap only. However the extremely high peak to average power ratio of OFDM modulated transmit signals and the demand of linearity inside the signal transmission chain results in a poor energy efficiency at the power amplifier. This paper claims, that as long as a cyclic prefix exists, any receive signal can be equalized in frequency domain. In this paper a transmission scheme with constant envelope is chosen for energy efficiency reasons. Therefore an FSK modulation and gaussian pulse shaping is used to create the transmit signal. Equalization at the receiver is done in frequency domain as known in OFDM. To simplify the equalization, a cyclic prefix is added to the transmit signal as well. This transmission scheme is introduced and evaluated in terms of spectral efficiency and bit error rate (BER) performance in this paper. The comparison is done with a typical OFDM system. In particular the characteristics of a nonlinear power amplifier are considered. It will be shown, that signals with constant envelope such as FSK modulated signals can also make use of an OFDM like equalization procedure with comparable BER performance and spectral requirements.
Keywords
- broadband communication, constant envelope, CPM, energy efficiency, FSK, GFSK, OFDM, PAPR
ASJC Scopus subject areas
- Engineering(all)
- Electrical and Electronic Engineering
Sustainable Development Goals
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In: FREQUENZ, Vol. 66, No. 5-6, 11.05.2012, p. 123-127.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Applying an FSK Based Transmission Scheme to Broadband Channels Using Frequency Domain Equalization
AU - Georgi, Sebastian
AU - Peissig, Jürgen
PY - 2012/5/11
Y1 - 2012/5/11
N2 - Equalization of broadband signals can be efficiently realized in frequency domain. One prominent example is the orthogonal frequency division multiplexing (OFDM) transmission technique. With the introduction of a cyclic prefix and a modulation onto orthogonal subcarriers the equalization can be performed in frequency domain with one tap only. However the extremely high peak to average power ratio of OFDM modulated transmit signals and the demand of linearity inside the signal transmission chain results in a poor energy efficiency at the power amplifier. This paper claims, that as long as a cyclic prefix exists, any receive signal can be equalized in frequency domain. In this paper a transmission scheme with constant envelope is chosen for energy efficiency reasons. Therefore an FSK modulation and gaussian pulse shaping is used to create the transmit signal. Equalization at the receiver is done in frequency domain as known in OFDM. To simplify the equalization, a cyclic prefix is added to the transmit signal as well. This transmission scheme is introduced and evaluated in terms of spectral efficiency and bit error rate (BER) performance in this paper. The comparison is done with a typical OFDM system. In particular the characteristics of a nonlinear power amplifier are considered. It will be shown, that signals with constant envelope such as FSK modulated signals can also make use of an OFDM like equalization procedure with comparable BER performance and spectral requirements.
AB - Equalization of broadband signals can be efficiently realized in frequency domain. One prominent example is the orthogonal frequency division multiplexing (OFDM) transmission technique. With the introduction of a cyclic prefix and a modulation onto orthogonal subcarriers the equalization can be performed in frequency domain with one tap only. However the extremely high peak to average power ratio of OFDM modulated transmit signals and the demand of linearity inside the signal transmission chain results in a poor energy efficiency at the power amplifier. This paper claims, that as long as a cyclic prefix exists, any receive signal can be equalized in frequency domain. In this paper a transmission scheme with constant envelope is chosen for energy efficiency reasons. Therefore an FSK modulation and gaussian pulse shaping is used to create the transmit signal. Equalization at the receiver is done in frequency domain as known in OFDM. To simplify the equalization, a cyclic prefix is added to the transmit signal as well. This transmission scheme is introduced and evaluated in terms of spectral efficiency and bit error rate (BER) performance in this paper. The comparison is done with a typical OFDM system. In particular the characteristics of a nonlinear power amplifier are considered. It will be shown, that signals with constant envelope such as FSK modulated signals can also make use of an OFDM like equalization procedure with comparable BER performance and spectral requirements.
KW - broadband communication
KW - constant envelope
KW - CPM
KW - energy efficiency
KW - FSK
KW - GFSK
KW - OFDM
KW - PAPR
UR - http://www.scopus.com/inward/record.url?scp=84861525467&partnerID=8YFLogxK
U2 - 10.1515/freq-2012-0028
DO - 10.1515/freq-2012-0028
M3 - Article
AN - SCOPUS:84861525467
VL - 66
SP - 123
EP - 127
JO - FREQUENZ
JF - FREQUENZ
SN - 0016-1136
IS - 5-6
ER -