simulation: simulate with RS-coding

pdu_rx.py

@@ -2,20 +2,71 @@
 
 import asyncio
 from time import sleep
+import framing
+from header import Onbeat_Header
 
-PACKET_LEN=128
+PACKET_LEN=255*4 + 32
+DATA_LEN=223*4
+HEADER_LEN=32
 
-async def tcp_client():
+async def tcp_client(file_2_send: str, callsign: str, rs_coding: bool = True):
     port = 50001
     reader, writer = await asyncio.open_connection(
         '127.0.0.1', port)
-    with open("loremipsum", "rb") as file_to_send:
-        while message := file_to_send.read(PACKET_LEN):
-            writer.write(message)
-            sleep(1)
+    with open(file_2_send, "rb") as file_to_send:
+        seq = 0
+        sent: list[list[int]] = []
+        while message := file_to_send.read(DATA_LEN if rs_coding == True else (PACKET_LEN - HEADER_LEN)):
+            sent.append([i for i in message])
+            frame = bytes(framing.encode_packet([i for i in message], callsign, seq, rs_coding))
+            writer.write(frame)
+            seq += 1
+            sleep(0.1)
+        else:
+            frame = bytes(framing.encode_packet([], callsign, seq, rs_coding))
+            for _ in range(0,16):
+                writer.write(frame)
+                sleep(0.1)
+                sent.append([])
 
 
+        output: list[tuple[Onbeat_Header, list[int]]] = []
+        packet_loss = 0
         while message := await reader.read(PACKET_LEN):
-            print(f"Got: {message.decode()}\n\n")
+            try:
+                received = framing.decode_packet([i for i in message])
+                output.append(received)
+                if received[0].pkt_len == 0:
+                    break
+            except Exception as e:
+                packet_loss += 1
+                print(e)
 
-asyncio.run(tcp_client())
+        return sent, output
+
+
+rs_coding = False
+filename = "loremipsum"
+sent, output = asyncio.run(tcp_client(filename, "HA5PLS", rs_coding))
+output.sort(key=lambda packet: packet[0].pkt_sequence_id)
+output.pop()
+
+def hamming_dist(msg:int, got:int):
+    return bin(msg ^ got).count('1')
+
+total_errors = sum([sum([hamming_dist(msg, got) for msg, got in zip(sent[pkt[0].pkt_sequence_id], pkt[1])]) for pkt in output])
+rcv_len = sum([pkt[0].pkt_len for pkt in output]) * 8
+ber = total_errors/rcv_len
+print(f"Total errors: {total_errors}, BER: {ber}")
+
+
+
+# file : bytes = b''
+# filesize = 0
+# for pkt in output:
+#     payload = bytes(pkt[1])
+#     file += payload
+#     filesize += pkt[0].pkt_len
+# print(file.decode(errors="ignore"))
+
+# print(f"Lost {packet_loss} packets during the transfer, filesize: {filesize}")

simulation/awgn.grc

@@ -37,7 +37,7 @@ blocks:
   id: variable
   parameters:
     comment: ''
-    value: '10'
+    value: '2'
   states:
     bus_sink: false
     bus_source: false
@@ -102,7 +102,7 @@ blocks:
     label: ''
     short_id: ''
     type: eng_float
-    value: '100'
+    value: '3'
   states:
     bus_sink: false
     bus_source: false
@@ -121,7 +121,7 @@ blocks:
     comment: ''
     maxoutbuf: '0'
     minoutbuf: '0'
-    roc_tolerance: '1'
+    roc_tolerance: '0.8'
     samp_rate: samp_rate
     symbol_map: symbol_map
     syncword: syncword
@@ -140,7 +140,6 @@ blocks:
     affinity: ''
     alias: ''
     comment: ''
-    data_len: data_len
     maxoutbuf: '0'
     minoutbuf: '0'
     preamble: '[0x33 for i in range(0, 128*2, 8)]'
@@ -149,7 +148,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [464, 256.0]
+    coordinate: [480, 264.0]
     rotation: 0
     state: enabled
 - name: blocks_tag_gate_0
@@ -168,7 +167,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [752, 264.0]
+    coordinate: [744, 280.0]
     rotation: 0
     state: enabled
 - name: blocks_throttle2_0
@@ -189,7 +188,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [1136, 264.0]
+    coordinate: [1144, 280.0]
     rotation: 0
     state: enabled
 - name: channels_channel_model_0
@@ -203,14 +202,14 @@ blocks:
     freq_offset: freq_offset
     maxoutbuf: '0'
     minoutbuf: '0'
-    noise_voltage: (1/EbN0*(1+RRC_ALPHA)/2)**0.5
+    noise_voltage: 1.0/sqrt(2* 10**(float(EbN0) / 10)) * sqrt(OVERSAMPLING/2)
     seed: '0'
     taps: '1.0'
   states:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [928, 232.0]
+    coordinate: [928, 248.0]
     rotation: 0
     state: enabled
 - name: data_len
@@ -222,7 +221,7 @@ blocks:
     label: ''
     short_id: ''
     type: intx
-    value: '128'
+    value: 255*4 + 32
   states:
     bus_sink: false
     bus_source: false
@@ -247,6 +246,19 @@ blocks:
     coordinate: [960, 136.0]
     rotation: 0
     state: enabled
+- name: import_0
+  id: import
+  parameters:
+    alias: ''
+    comment: ''
+    imports: from math import log10, log2, sqrt
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [968, 24.0]
+    rotation: 0
+    state: enabled
 - name: network_socket_pdu_1
   id: network_socket_pdu
   parameters:
@@ -647,7 +659,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [1320, 272.0]
+    coordinate: [1320, 288.0]
     rotation: 0
     state: enabled
 - name: virtual_source_0