Re: [Discuss-gnuradio] Symbol to chip Mapping
Not quite: You set the "dimension" of the c2s block to 32. No need to set any variable to 16... Then you have to input to the c2s block an array of size 16 by 32 (or simply 16x32=512). Take a look at some examples of how c2s block is used in gr-trellis. Achilleas On Mon, Mar 11, 2019 at 11:58 PM Tellrell White wrote: > Okay. Let me make sure i’m clear on this. > > My flow graph looks like the following : > > Random source -> packed to unpacked -> chunks to symbols > > The source and packed to unpacked are set to byte and the packed to > unpacked is outputting 4 bits per chunks so am I setting the dimension of > the “chunks to symbols” block to 16 (0-15) and inputting 1024 values, 0’s > and 1’s, (32 values for each dimension) to complete the mapping? > > Thanks for the assistance. > > Tellrell > > Sent from my iPhone > > > On Mar 11, 2019, at 8:28 AM, Achilleas Anastasopoulos > wrote: > > > > Yes this can be done with chunks-to-symbols. > > This is essentially a 16 x 32 lookup table: > > > > turn your 4 bits into a byte which indices a lookup table with 32 > dimensions > > (set the "dimension" variable to 32 in chunks-to-symbols). > > > > Achilleas > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Symbol to chip Mapping
Okay. Let me make sure i’m clear on this. My flow graph looks like the following : Random source -> packed to unpacked -> chunks to symbols The source and packed to unpacked are set to byte and the packed to unpacked is outputting 4 bits per chunks so am I setting the dimension of the “chunks to symbols” block to 16 (0-15) and inputting 1024 values, 0’s and 1’s, (32 values for each dimension) to complete the mapping? Thanks for the assistance. Tellrell Sent from my iPhone > On Mar 11, 2019, at 8:28 AM, Achilleas Anastasopoulos > wrote: > > Yes this can be done with chunks-to-symbols. > This is essentially a 16 x 32 lookup table: > > turn your 4 bits into a byte which indices a lookup table with 32 dimensions > (set the "dimension" variable to 32 in chunks-to-symbols). > > Achilleas ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Symbol to chip Mapping
Yes this can be done with chunks-to-symbols. This is essentially a 16 x 32 lookup table: turn your 4 bits into a byte which indices a lookup table with 32 dimensions (set the "dimension" variable to 32 in chunks-to-symbols). Achilleas ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Symbol to chip Mapping
Hello All I have a flow graph in which I'm trying to map 4 bit symbols to 32 bit chip sequences similar to what was done in GR- IEEE 802.15.4. However, I'm unsure as to how do this. Is there a way this can be done using an existing block such as the chunks to symbols block for instance? Attached is a flow graph of what I have thus far. Tellrell sym_chip.grc Description: Binary data ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
