Hi,
thank you for your work on the real-time version of the gps-sdr-sim library!

I am trying to get the gnu radio part running, but ran into a problem there The source is marked as 'missing block' for me. Is there some kind of libraries required to run it? (3rd party sdr lib for instance..)

Updating gnuradio to 3.9 did not help, but now I can say that it is not one of the newer tcp server/client nodes..

Thanks!

Hello, I set the maximum duration to 86400 seconds. The signal will be interrupted after about 3 hours of operation, and the signal will be restored after about two hours. During this period, the command has been running all the time. This has been the case several times. What is the problem?

RT，请问新版本下如何在grc里导入tcp流呢？目前看起来貌似只有blocks_udp_source

gps-sdr-sim-realtime,可以做成visual studio，windows版的吗，折腾了好几天

[chown@mbp ~/Downloads/gps-sdr-sim-realtime (master *)]$ bladeRF-cli -s bladerf.script

For best results, it is not recommended to set both RX and TX to the
same frequency. Instead, consider offsetting them by at least 1 MHz
and mixing digitally.

For the above reason, 'set frequency ` is deprecated and
scheduled for removal in future bladeRF-cli versions.

Please use 'set frequency rx' and 'set frequency tx' to configure
channels individually.

RX1 Frequency: 1575419998 Hz (Range: [70000000, 6000000000])
RX2 Frequency: 1575419998 Hz (Range: [70000000, 6000000000])
TX1 Frequency: 1575419998 Hz (Range: [47000000, 6000000000])
TX2 Frequency: 1575419998 Hz (Range: [47000000, 6000000000])

Setting RX1 sample rate - req: 2600000 0/1Hz, actual: 2600000 0/1Hz
Setting RX2 sample rate - req: 2600000 0/1Hz, actual: 2600000 0/1Hz
Setting TX1 sample rate - req: 2600000 0/1Hz, actual: 2600000 0/1Hz
Setting TX2 sample rate - req: 2600000 0/1Hz, actual: 2600000 0/1Hz

RX1 Bandwidth: 2500000 Hz (Range: [200000, 56000000])
RX2 Bandwidth: 2500000 Hz (Range: [200000, 56000000])
TX1 Bandwidth: 2500000 Hz (Range: [200000, 56000000])
TX2 Bandwidth: 2500000 Hz (Range: [200000, 56000000])

Error (bladerf.script:3): Invalid operation or parameter

when i try to compile with "$ gcc gpssim.c -lm -O3 -o gps-sdr-sim" compiler on ubuntu using usrp X310, the following error generated.....the error is pointing in to "socket.c" which is about connecting to TCP.......

$ gcc gpssim.c -lm -O3 -o gps-sdr-sim
In file included from gpssim.c:14:0:
socket.c: In function ‘timem’:
socket.c:41:2: warning: implicit declaration of function ‘gettimeofday’ [-Wimplicit-function-declaration]
gettimeofday(&t, NULL);
^~~~~~~~~~~~
socket.c: In function ‘udprecv’:
socket.c:60:41: warning: passing argument 6 of ‘recvfrom’ makes pointer from integer without a cast [-Wint-conversion]
return recvfrom(s, dataa, siz, 0,&from,sizeof(from));
^~~~~~
In file included from /usr/include/x86_64-linux-gnu/sys/socket.h:269:0,
from socket.c:2,
from gpssim.c:14:
/usr/include/x86_64-linux-gnu/bits/socket2.h:64:1: note: expected ‘socklen_t * restrict {aka unsigned int * restrict}’ but argument is of type ‘long unsigned int’
recvfrom (int __fd, void *__restrict __buf, size_t __n, int __flags,
^~~~~~~~
In file included from gpssim.c:14:0:
socket.c: At top level:
socket.c:63:30: warning: excess elements in array initializer
double llhr[3]={39.68,139,76,10};
^~
socket.c:63:30: note: (near initialization for ‘llhr’)
gpssim.c: In function ‘usage’:
gpssim.c:1651:9: warning: format ‘%f’ expects argument of type ‘double’, but argument 2 has type ‘char *’ [-Wformat=]
printf("Usage: gps-sdr-sim [options]\n"
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
gpssim.c:1665:3:
" -n Use TCP connect to Gnuradio TCP-Source for\n realtime simulation.\n",

The mapper.py is written in python2, which requires module "web".
Use the following commands to install this module.

mapper.py 使用了Python2的模块"web"，这个需要使用如下命令额外安装。

sudo apt install python-pip
pip install web.py==0.40

Ref:
https://webpy.org/install

in ubuntu try gps-sdr-sim -n connect to GNUradio TCP source
./gps-sdr-sim -e brdc3540.14n -n 2000 -v -d 3600 -w -b 8
connect: Connection refused

change the port can't solve the problem

master\top_block.py", line 234, in
main()
File "op_block.py", line 212, in main
tb = top_block_cls()
File "top_block.py", line 172, in init
self.network_tcp_source_0 = network.tcp_source.tcp_source(itemsize=gr.sizeof_gr_complex*1,addr='127.0.0.1',port=1234,server=True)
File "C:\Program Files\PothosSDR\lib\python3.9\site-packages\gnuradio\network\tcp_source.py", line 86, in init
self.connect(blocks.file_descriptor_source(itemsize, fd), self)
TypeError: init(): incompatible constructor arguments. The following argument types are supported:
1. gnuradio.blocks.blocks_python.file_descriptor_source(itemsize: int, fd: int, repeat: bool = False)

Invoked with: 8, None

I am using hackrf.
With the original gps-sdr-sim I can successfully transmit GPS signals that are detected by test units. So the hardware looks OK.

With this project I can connect to gnuradio and show the waterfall and frequency graph:

But no signal gets detected by the GPS units.
If I can help debugging in any way please just tell me.
Thanks,