Design of a Practical Handheld Software Radio: Part Ⅱ

摘要

The design of a standalone battery powered Software Defined Radio (SDR) is presented. Three rounds of prototypes were designed, built, and tested over the last three years. The hardware architecture of the newest design is detailed, with the goal of getting the device into the field to build real RF links. The software stack, from the high-level websocket user interface down to the embedded Linux operating system are discussed. Finally, the latest work on the Field Programmable Gate Array (FPGA) modem are presented, including optimization work that drastically improves simulation performance.