WHITE NOISE

White noise is defined to be a stationary random process having a constant spectral density function:
$$S_{wn}(j\omega)=\int_{-\infty}^{\infty}R_X(\tau)e^{-j\omega\tau}d(\tau)=A=const$$
where $$R_X(\tau)=\int_{-\infty}^{\infty}x(t)x(t+\tau)$$

Realtime GNSS SDR Receiver

In this post, i will describe the most struggles of implementing GNSS-SDR RX and how to overcome the limitations which based on our experiments in this field
1. PC-BASED RX
1.1 Analysis of the limitations
1.2 Solutions
2. FPGA-BASED RX

SDRs

1. PC Based Receiver
- Most popular and cited: AKOS Matlab source code, GNSS-SDR (Offline and Realtime), GNSS-SDRlib (very understandable source code -- need to more reviews)
2. FPGA Based Receiver
HelloGNSS
Namuru
SwiffNav
"Build your own GPS Receiver"

Frontends

1. SDRNAV00 (Michele)
http://michelebavaro.blogspot.it/
2. SIGE GN3S
https://www.sparkfun.com/products/10981
3. HG (HelloGNSS)
hellognss.com
4. USRP
5. RTL32U (TCXO added Version)
http://www.rtl-sdr.com/tag/rtl2832/
6. Updating ...