Hello everyone, I am trying to implement OFDM TX in GRC but with fft length 2048. according to fft length i have updated syn words, pilot carriers, pilot symbols, occupied carriers. When i run the flow graph i get this error:
gr::vmcircbuf_sysv_shm: shmget (1): Invalid argument gr::vmcircbuf_sysv_shm: shmget (1): Invalid argument gr::vmcircbuf_sysv_shm: shmget (1): Invalid argument gr::buffer::allocate_buffer: failed to allocate buffer of size 1536000 KB gr::vmcircbuf_sysv_shm: shmget (1): Invalid argument gr::vmcircbuf_sysv_shm: shmget (1): Invalid argument gr::vmcircbuf_sysv_shm: shmget (1): Invalid argument gr::buffer::allocate_buffer: failed to allocate buffer of size 1536000 KB terminate called after throwing an instance of 'std::bad_alloc' what(): std::bad_alloc Buffer size is around 1.5GB. i tried to set kernel.shmmax to 8GB but its not working. I am using Ubuntu 14.04. Kernel and GNU details are: GNU Radio Companion 3.7.8rc1 GNU C++ version 4.8.4 UHD_003.009.git-217-g012381d9 kernel release - 3.13.0-58-generic kernel version - #97-Ubuntu SMP I am new to work with GNU Radio. I am not able to correct this error. If anyone has any idea to correct this please tell me. Best Regards Hitesh
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