PocketSDR

Pocket SDR FE 4CH

Overview

Pocket SDR FE 4CH is an open-source GNSS SDR RF frontend device for Pocket SDR. The device consists of 4 CH Maxim MAX2771 ([1]) GNSS RF front-end ICs (LNA, mixer, filter, ADC, frequency synthesizer) and a Cypress EZ-USB FX3 USB 3.0 controller ([2], [3], [4]) to connect to host PCs.

All the RF CHs are able to be configured for GNSS L1 band (1525 - 1610 MHz), or GNSS L2/L5/L6 band (1160 - 1290 MHz). The frequency of the reference oscillator (TCXO) is 24.000 MHz, and the ADC sampling rate can be configured up to 48 Msps.

Specifications

• Number of RF channels: 4 CH
• LO (PLL) Frequency: 1525 ~ 1610 MHz (GNSS L1 band) or 1160 ~ 1290 MHz (GNSS L2/L5/L6 band)
• IF Bandwidth: 2 ~ 36 MHz
• Sampling Rate: 4, 6, 8, 10, 12, 16, 20, 24, 32, 40 or 48 Msps
• Sampling Type: I or I/Q sampling, 2 bits resolution
• Host I/F: USB 3.0, type-C (high-speed 480 Mbps or super speed 5 Gbps)
• Power: 5V, USB bus power

References

[1] Maxim integrated, MAX2771 Multiband Universal GNSS Receiver, July 2018

[2] Infineon, CYUSB301X, CYUSB201X, EZ-USB FX3 SuperSpeed USB Controller Datasheet, Rev. Z, September 29, 2022

[3] Cypress Semiconductor, EZ-USB FX3 Technical Reference Manual, Rev.F, May 9, 2019

[4] Cypress Semiconductor, FX3 Programmers Manual, Rev.K