High efficiency signaling with minimum spacecraft hardware
First Claim
1. A method for communicating input data channels through a satellite, the method comprising:
- (a) block encoding input data channels to produce a block encoded uplink data stream;
(b) modulating said block encoded uplink data stream to produce a modulated uplink data stream;
(c) transmitting said modulated uplink data stream to a satellite;
(d) demodulating said modulated uplink data stream in said satellite to produce a recovered block encoded uplink data stream;
(e) convolutionally encoding in said satellite said recovered block encoded uplink data stream without decoding the recovered block encoded uplink data stream to produce a concatenated coded downlink data stream;
(f) modulating said concatenated coded downlink data stream to produce a modulated downlink data stream;
(g) transmitting said modulated downlink data stream to a receiver.
4 Assignments
0 Petitions
Accused Products
Abstract
A method is disclosed for efficiently transmitting large numbers of data channels through a satellite (24). The method uses a block encoder (28) that encodes the data channels with a block code to produce an encoded uplink data stream. A modulator (30) modulates the encoded uplink data stream. A transmit antenna (32) then sends the resultant modulated uplink data stream (34) to the satellite (24). The satellite uses a satellite demodulator (48) and a switch (50) to produce an internal data stream consisting of selected data channels in the uplink data stream (34). The internal data stream is fed into a convolutional encoder (52). The output of the convolutional encoder (52) is connected to a satellite modulator (54). The satellite transmit antenna (56) then sends the resultant modulated downlink data stream (58) to a receiver.
-
Citations
20 Claims
-
1. A method for communicating input data channels through a satellite, the method comprising:
-
(a) block encoding input data channels to produce a block encoded uplink data stream; (b) modulating said block encoded uplink data stream to produce a modulated uplink data stream; (c) transmitting said modulated uplink data stream to a satellite; (d) demodulating said modulated uplink data stream in said satellite to produce a recovered block encoded uplink data stream; (e) convolutionally encoding in said satellite said recovered block encoded uplink data stream without decoding the recovered block encoded uplink data stream to produce a concatenated coded downlink data stream; (f) modulating said concatenated coded downlink data stream to produce a modulated downlink data stream; (g) transmitting said modulated downlink data stream to a receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for communicating input data channels through a satellite, the method comprising:
-
(a) block encoding input data channels to produce a plurality of block encoded uplink data streams; (b) modulating said plurality of block encoded uplink data streams to produce a plurality of modulated uplink data streams; (c) transmitting said plurality of modulated uplink data streams to said satellite; (d) demodulating said plurality of modulated uplink data streams in said satellite to produce at least one recovered block encoded uplink data stream; (e) switching said at least one recovered block encoded uplink data stream to a plurality of internal data streams, each of said plurality of internal data streams associated with an individual convolutional encoder; (f) convolutionally encoding each of said plurality of internal data streams without block decoding said recovered block encoded uplink data stream in said satellite to produce a plurality of concatenated coded downlink data streams; (g) modulating each of said plurality of concatenated coded downlink data streams to produce a plurality of modulated downlink data streams; (h) transmitting each of said plurality of modulated downlink data streams. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification