TY - GEN
T1 - A Sub-mW all-digital signal component separator with branch mismatch compensation for OFDM LINC transmitters
AU - Chen, Tsan Wen
AU - Tsai, Ping Yuan
AU - Yu, Jui Yuan
AU - Lee, Chen-Yi
PY - 2010/12/1
Y1 - 2010/12/1
N2 - This paper presents a sub-mW all-digital signal component separator (SCS) with a novel branch mismatch compensation scheme for OFDM LINC transmitters, including a phase calculator and a digital-control phase shifter (DCPS) pair. This chip is manufactured in 90nm standard CMOS process with active area 0.06mm2. The DCPS can generate phase-modulated signal at IF 100MHz with 8-bit resolution and RMS error 9.33ps (0.34°). The phase calculation can be operated with maximum 50MHz speed at 0.5V supply voltage, resulting in 73.88% power reduction, and the overall SCS power is only 949.5μW. With the aid of this SCS, the branch mismatch compensation scheme provides 0.02dB gain and 0.15° phase fine-tune resolution. The system EVM with 64-QAM OFDM signals is -29.81dB, and the spectrum can pass the mask test of IEEE 802.11a.
AB - This paper presents a sub-mW all-digital signal component separator (SCS) with a novel branch mismatch compensation scheme for OFDM LINC transmitters, including a phase calculator and a digital-control phase shifter (DCPS) pair. This chip is manufactured in 90nm standard CMOS process with active area 0.06mm2. The DCPS can generate phase-modulated signal at IF 100MHz with 8-bit resolution and RMS error 9.33ps (0.34°). The phase calculation can be operated with maximum 50MHz speed at 0.5V supply voltage, resulting in 73.88% power reduction, and the overall SCS power is only 949.5μW. With the aid of this SCS, the branch mismatch compensation scheme provides 0.02dB gain and 0.15° phase fine-tune resolution. The system EVM with 64-QAM OFDM signals is -29.81dB, and the spectrum can pass the mask test of IEEE 802.11a.
UR - http://www.scopus.com/inward/record.url?scp=79952834845&partnerID=8YFLogxK
U2 - 10.1109/ASSCC.2010.5716592
DO - 10.1109/ASSCC.2010.5716592
M3 - Conference contribution
AN - SCOPUS:79952834845
SN - 9781424482979
T3 - 2010 IEEE Asian Solid-State Circuits Conference, A-SSCC 2010
SP - 209
EP - 212
BT - 2010 IEEE Asian Solid-State Circuits Conference, A-SSCC 2010
Y2 - 8 November 2010 through 10 November 2010
ER -