The EDGE standard is an evolution of GSM, overcoming the limited data speed. This improvement is obtained using a 3π/8 8-PSK modulation scheme, increasing the available on-air data rate up to 812.5 kbps. The drawback of this modulation scheme is the non constant envelope, demanding a 17 dB dynamic range PA. An easy way to implement the EER architecture is the two-point modulation in the theta-path. The quantization in the high-pass phase path together with the PLL bandwidth causes both a spectrum regrowth and an EVM increasing.
EVM degradation in EDGE two point modulation scheme due to quantization effects / Avitabile, Gianfranco; Lofù, N.. - (2004), pp. 299-302. (Intervento presentato al convegno Radio and Wireless Conference tenutosi a Atlanta, GA nel September 19-22, 2004) [10.1109/RAWCON.2004.1389135].
EVM degradation in EDGE two point modulation scheme due to quantization effects
AVITABILE, Gianfranco;
2004
Abstract
The EDGE standard is an evolution of GSM, overcoming the limited data speed. This improvement is obtained using a 3π/8 8-PSK modulation scheme, increasing the available on-air data rate up to 812.5 kbps. The drawback of this modulation scheme is the non constant envelope, demanding a 17 dB dynamic range PA. An easy way to implement the EER architecture is the two-point modulation in the theta-path. The quantization in the high-pass phase path together with the PLL bandwidth causes both a spectrum regrowth and an EVM increasing.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
