--- title: Dev log\: GPS receiver based on MAX2769 and Zynq 7010 FPGA author: peter date: 2024-10-02 20:10:44 +0800 categories: [Electronics, Programming] # Blogging | Electronics | Programming | Mechanical | SelfHosting tags: [rf, electronics, fpga, ebaz4205, max2769, zynq7010] # systems | embedded | rf | microwave | electronics | solidworks | automation | tip # image: assets/img/2024-10-02-Dev-log-GPS-receiver/preview.png --- ## 🚧🚧 THIS PAGE IS NOT FINISHED 🚧🚧 ## Notes: https://github.com/iliasam/STM32F4_SDR_GPS?tab=readme-ov-file https://habr.com/ru/articles/789382/ https://dsp.stackexchange.com/questions/92028/max2769-i-q-for-signal-acquisition-tracking ## Datasheet > The MAX2769B features an on-chip ADC to digitize the > downconverted GPS signal. The maximum sampling > rate of the ADC is approximately 50Msps. The sampled > output is provided in a **2-bit format (1-bit magnitude and > 1-bit sign) by default** and also can be configured as a > **1-bit or 2-bit** in both I and Q channels, or 1-bit, 2-bit, or > 3-bit in the I channel only. The ADC supports the digital > outputs in three different formats: the unsigned binary, > the sign and magnitude, or the two’s complement format > by setting bits FORMAT in Configuration register 2. MSB > bits are output at I1 or Q1 pins and LSB bits are output at > I0 or Q0 pins, for I or Q channel, respectively. In the case > of 3-bit, output data format is selected in the I channel > only, the MSB is output at I1, the second bit is at I0, and > the LSB is at Q1. Surely two-bit correlation is the same process, just with more precision because of the additional bit?