Title :
Cross-correlated correlative encoding: an efficient modulation method
Author :
Brown, Chuck ; Feher, Kamilo
Author_Institution :
California Univ., Davis, CA, USA
fDate :
3/1/1997 12:00:00 AM
Abstract :
A new cross-correlated correlative baseband encoding scheme is presented as a means of doubling the capacity of a mobile communication systems without the cost of complex baseband filtering. System performance is studied in a non-linear amplified channel for 6 to 9 dB improved power efficiency. The system is analyzed for spectrum efficiency, adjacent channel interference (ACI), co-channel interference (CCI) and bit error rate (BER) performance in a Rayleigh faded cellular network. Computer simulated results and hardware experimentation show that modified correlative encoding achieves up to a 70% improvement in spectrum efficiency and double network capacity when compared to constant envelope GMSK modulation used in GSM, DCS1800, PCS1900 and DECT systems
Keywords :
Rayleigh channels; adjacent channel interference; cellular radio; channel capacity; cochannel interference; correlation methods; encoding; fading; quadrature phase shift keying; radio networks; ACI; BER performance; CB-FQPSK; CCI; DCS1800; DECT; GSM; PCS1900; Rayleigh faded cellular network; adjacent channel interference; bit error rate; cochannel interference; computer simulated results; constant envelope GMSK modulation; cross-correlated correlative baseband encoding; hardware experimentation; mobile communication systems; modified correlative encoding; network capacity; nonlinear amplified channel; power efficiency; spectrum efficiency; system capacity; system performance; Baseband; Bit error rate; Costs; Encoding; Filtering; Interchannel interference; Mobile communication; Performance analysis; Radiofrequency interference; System performance;
Journal_Title :
Broadcasting, IEEE Transactions on
