GPU Software Implementation of a Synchronizer for Fixed WiMAX Base-Station
Date Issued
2011
Date
2011
Author(s)
Mao, Song-Yen
Abstract
In 2008, ZTE in China has launched the ZXGW B8036 SDR (Software-Defined Radio) base-station, the world’s first pre-commercial SDR base-station. The concept of SDR is a solution for enabling one set of hardware to support multi-standards. Because of the reconfigurability, SDR can cut out the high cost of the conventional way by using one ASIC (Application-Specific Integrated Circuit) chip per system in a single device. In addition, SDR has the adaptability and flexibility for future modifications, and even upgrades to new standards. In this Thesis, we propose a synchronizer architecture for base-station according to IEEE 802.16d OFDM specifications, and implement it through SDR.
Conventionally, SDR uses DSPs (Digital Signal Processor) as platforms. In order to be able to process the massive data at a base-station, we implement our work on GPU (Graphics Processing Unit). By using CUDA (Compute Unified Device Architecture), we can utilize the highly-efficient parallel-processing power of GPU’s many-core architecture. Through the analysis of the synchronization algorithms and the hardware architecture and the software hierarchy of CUDA, we implement a synchronizer containing initial synchronization, CFO (Carrier Frequency Offset) estimation, residual CFO and SCO (Sampling Clock Offset) estimations and compensations of CFO and SCO. Finally, we apply a design flow to enable the synchronizer to meet the requirements of real-time processing and multiuser capacity.
Subjects
Software-Defined Radio
Fixed WiMAX
Synchronizer
GPU
CUDA
Type
thesis
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