Throughput Enhancement by Cancellation of Synchronization and Pilot Channel for UMTS High Speed Downlink Packet Access
Sprache des Titels:
Proc. of 6th International Workshop on Signal Processing Advances for Wireless Communications (SPAWC2006)
In this paper, we show by simulations that the interference
generated by the Synchronization Channel (SCH) and Common
Pilot Channel (CPICH) has considerable impact on the
throughput of the High-Speed Physical Downlink Shared
Channel (HS-PDSCH) in UMTS. First, the simulation model
for High Speed Downlink Packet Access (HSDPA) in UMTS
is described. The downlink physical layer for the user data
on the HS-PDSCH is modelled in detail, whereas the associated signalling is idealised as error-free. The interference from signalling and data channels on the HS-PDSCH is modelled adequately. As a general guideline for system settings in the simulations, we use the test cases specified in 3GPP TS 25.101 whenever applicable.
Cancelling the SCH interference at the mobile side leads
to an improvement of approx. 1dB on an additive white
Gaussian noise channel. Therefore, it is worthwhile to
implement interference cancellation (IC) for the SCH and
CPICH in future mobile receivers for HSDPA.