SISO_OFDM Namespace Reference

Functions
def	init ()
	Functions #. More...
def	find_optimal_gain (sdrTx, sdrRx)
def	animate (i, num_samps_rd, rxStream, sdr, sdrTx, ofdm_params, tx_struct, ota, ofdm_obj, agc_en, infoTx)
def	txrx_app (args, rate, ampl, ant, txgain, rxgain, freq, bbfreq, serialTx, serialRx, ofdm_params, num_samps_rd, ota, ofdm_obj, agc_en)
def	main ()
	Main #. More...

Variables
bool	running = True
	Global Parameters #. More...
int	pkt_count = 0
int	nextValRX = 0
int	nextValTX = 0
int	prevValTX = 0
int	FIG_LEN = 2**13
int	APPLY_CFO_CORR = 1
int	APPLY_SFO_CORR = 1
int	APPLY_PHASE_CORR = 1
	fig = plt.figure(figsize=(10, 20), dpi=120)
	Create Plots #. More...
	hspace
	top
	bottom
	gs = gridspec.GridSpec(ncols=4, nrows=5)
	ax1 = fig.add_subplot(gs[0, :])
	title = ax1.text(0.5, 1, '|', ha="center")
	label
	animated
	fontsize
	ax2 = fig.add_subplot(gs[1, :])
	ax3 = fig.add_subplot(gs[2, :])
	ax4 = fig.add_subplot(gs[3, :])
	ax5 = fig.add_subplot(gs[4, 0:2])
	ax6 = fig.add_subplot(gs[4, 2:4])

Detailed Description

 SISO_OFDM.py

   Generates, transmits, and receives and OFDM signal.
   The user can select one of the following modulation schemes BPSK/QPSK/16QAM/64QAM
   It requires two Iris boards (chained or unchained). The TX board will transmit
   the signal from RF chain A and the RX board will receive it at RF chain A as well
   (script can be extended to support both chains).
   The script can be run in two modes:
       - SIM (simulation using an AWGN channel)
       - OTA (over-the-air transmission)

   Figure "SISO_OFDM_output.png" inside the "figures" folder shows an the output
   generated for a 16-QAM OTA transmission

    NOTE ON GAINS:
    Gain settings will vary depending on RF frontend board being used
    If using CBRS:
rxgain: at 2.5GHz [3:1:105], at 3.6GHz [3:1:102]
txgain: at 2.5GHz [16:1:81], at 3.6GHz [15:1:81]

    If using only Dev Board:
    rxgain: at both frequency bands [0:1:30]
    txgain: at both frequency bands [0:1:42]

    The code assumes both TX and RX have the same type of RF frontend board.

   Usage example: python3 SISO_OFDM.py --mode="SIM"

   Based on the wl_example_siso_ofdm.m script developed for the WARP platform:
   http://warpproject.org/trac/wiki/WARPLab/Examples/OFDM

---------------------------------------------------------------------
 Copyright © 2018-2019. Rice University.
 RENEW OPEN SOURCE LICENSE: http://renew-wireless.org/license
 ---------------------------------------------------------------------

Function Documentation

animate()

def SISO_OFDM.animate	(		i,
			num_samps_rd,
			rxStream,
			sdr,
			sdrTx,
			ofdm_params,
			tx_struct,
			ota,
			ofdm_obj,
			agc_en,
			infoTx
	)

find_optimal_gain()

def SISO_OFDM.find_optimal_gain	(		sdrTx,
			sdrRx
	)

    Brute force over multiple gain combinations to find best TX/RX gains.
    TODO: Fully automate this by checking symbol error rate rather than visually checking constellation

init()

def SISO_OFDM.init

(

)

Functions #.

Initialize plotting objects 

main()

def SISO_OFDM.main

(

)

Main #.

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txrx_app()

def SISO_OFDM.txrx_app	(		args,
			rate,
			ampl,
			ant,
			txgain,
			rxgain,
			freq,
			bbfreq,
			serialTx,
			serialRx,
			ofdm_params,
			num_samps_rd,
			ota,
			ofdm_obj,
			agc_en
	)

Setup transmitter, generate TX signal, and write data into RAM for TX

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Variable Documentation

animated

SISO_OFDM.animated

APPLY_CFO_CORR

int SISO_OFDM.APPLY_CFO_CORR = 1

APPLY_PHASE_CORR

int SISO_OFDM.APPLY_PHASE_CORR = 1

APPLY_SFO_CORR

int SISO_OFDM.APPLY_SFO_CORR = 1

ax1

SISO_OFDM.ax1 = fig.add_subplot(gs[0, :])

ax2

SISO_OFDM.ax2 = fig.add_subplot(gs[1, :])

ax3

SISO_OFDM.ax3 = fig.add_subplot(gs[2, :])

ax4

SISO_OFDM.ax4 = fig.add_subplot(gs[3, :])

ax5

SISO_OFDM.ax5 = fig.add_subplot(gs[4, 0:2])

ax6

SISO_OFDM.ax6 = fig.add_subplot(gs[4, 2:4])

bottom

SISO_OFDM.bottom

fig

SISO_OFDM.fig = plt.figure(figsize=(10, 20), dpi=120)

Create Plots #.

FIG_LEN

int SISO_OFDM.FIG_LEN = 2**13

fontsize

SISO_OFDM.fontsize

gs

SISO_OFDM.gs = gridspec.GridSpec(ncols=4, nrows=5)

hspace

SISO_OFDM.hspace

label

SISO_OFDM.label

nextValRX

int SISO_OFDM.nextValRX = 0

nextValTX

int SISO_OFDM.nextValTX = 0

pkt_count

int SISO_OFDM.pkt_count = 0

prevValTX

int SISO_OFDM.prevValTX = 0

running

bool SISO_OFDM.running = True

Global Parameters #.

title

SISO_OFDM.title = ax1.text(0.5, 1, '|', ha="center")

top

SISO_OFDM.top