论文信息 - EVM degradation in EDGE two point modulation scheme due to quantization effects

EVM degradation in EDGE two point modulation scheme due to quantization effects

The EDGE standard is an evolution of GSM, overcoming the limited data speed. This improvement is obtained using a 3/spl pi//8 8-PSK modulation scheme, increasing the available on-air data rate up to 812.5 kbit/s. The drawback of this modulation scheme is the nonconstant envelope, demanding a 17 dB dynamic range PA. An easy way to implement the EER architecture is with 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 increasing EVM.

G. Avitabile | N. Lofu

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