초록 ▼

A communication system transmits orthogonally encoded data at a symbol rate which is selected from a plurality of symbol rates. The data is encoded in a plurality of packets, each packet having a plurality of symbols having signal points in a field. The signal points of consecutively transmitted sym

A communication system transmits orthogonally encoded data at a symbol rate which is selected from a plurality of symbol rates. The data is encoded in a plurality of packets, each packet having a plurality of symbols having signal points in a field. The signal points of consecutively transmitted symbols are correlated unless the rate is changed, and the data is encoded such that only particular orthogonal descendants of a selected maximum rate code are used. The encoded data is transmitted to a receiver, and orthogonally decoded. A change in the rate of data transmission is recognized when the signal points of consecutively transmitted symbols are not correlated.

대표청구항 ▼

What is claimed is: 1. A communication station comprising a receiver, a transmitter and at least one antenna, including: means for orthogonally decoding data received from another communication station, the data having been encoded in a plurality of packets, each packet having a plurality of signal

What is claimed is: 1. A communication station comprising a receiver, a transmitter and at least one antenna, including: means for orthogonally decoding data received from another communication station, the data having been encoded in a plurality of packets, each packet having a plurality of signal points in a field, the signal points of consecutively transmitted symbols being correlated unless a symbol rate is changed, the data having been further encoded such that only orthogonal descendants of a selected maximum rate code are used for communications with the communication station, means for identifying the signal points of consecutively transmitted symbols in the decoded data and recognizing a change in the rate of data transmission when the signal points of consecutively transmitted signal points are not correlated, and wherein two consecutive symbols ρt and ρ t+1 are decoded at a first symbol rate when the data is decoded, (b) if both symbols ρt and ρt+1 are considered valid, both symbols ρt and ρt+1 are decoded to determine whether they are correlated; (c) if the symbols ρt and ρt+1 are not correlated, then the first symbols are not correlated, then the first symbol ρt is output and the symbols ρt+1 and a following symbol ρt+2 are decoded; and (d) if both symbols ρt+1 and ρt+2 are considered valid, designating the symbols ρt+1 and ρ t+2 as the symbols ρt and ρt+1 and repeating steps (b), (c) and (d), unless consecutive symbols are correlated. 2. The communication station of claim 1, wherein (e) if the symbols ρt and ρt+1 are not correlated, then the first symbol rate q is doubled so that ρt and ρt+ 1 are decoded as a single symbol ρ't and a second symbol ρ't+1 based on the symbol rate 2q is decoded; if both symbols ρ't and ρ't+1 are valid, then designating the repeating steps (b), (c) and (d). 3. The communication station of claim 1, wherein if the symbol ρt+1 is considered valid and the symbol ρt+2 is considered invalid in step (d), then the symbol ρt+1 is designated ρt and is output, the first symbol rate q is reduced to q/2 and a new symbols ρ't+1 and ρ't+2 are computed from ρt+2, ρ't+1 and ρ 't+2 are decoded, and processed further depending on whether ρ't+1 and ρ't+2 are valid or invalid. 4. The communication station of claim 1, wherein if the symbol ρt+1 is considered invalid in step (d), then the first symbol rate q is reduced to q/2 and ρt is decoded as ρ't and ρ't+1, ρ't and ρ't+ 1 are checked, and are processed further depending on whether they are valid or invalid. 5. A communication station comprising a receiver, a transmitter and at least one antenna, including: a decoder which orthogonally decodes data received from another communication station, the data having been encoded in a plurality of packets, each packet having a plurality of signal points in a field, the signal points of consecutively transmitted symbols being correlated unless a symbol rate is changed, the data having been further encoded such that only orthogonal descendants of a selected maximum rate code are used for communications with the communication station, a detector which identifies the signal points of consecutively transmitted symbols in the decoded data and recognizes a change in the rate of data transmission when the signal points of consecutively transmitted signal points are not correlated, and wherein (a) two consecutive symbols ρt and ρ t+1, are decoded at a first symbol rate when the data is decoded, (b) if both symbols ρt and ρt+1 are considered valid, both symbols ρt and ρt+1 are decoded to determine whether they are correlated; (c) if the symbols ρt and ρt+1 are not correlated, then the first symbols are not correlated, then the first symbol ρt is output and the symbols ρt+1 and a following symbol ρt+2 are decoded; and (d) if both symbols ρt+1 and ρt+2 are considered valid, designating the symbols ρt+1 and ρ t+2 as the symbols ρt and ρt+1 and repeating steps (b), (c) and (d), unless consecutive symbols are correlated. 6. The communication station of claim 5, wherein (e) if the symbols ρt and ρt+1 are not correlated, then the first symbol rate q is doubled so that ρt and ρt+ 1 are decoded as a single symbol ρ't and a second symbol and ρ't+1 based on the symbol rate 2q is decoded; if both symbols ρ't and ρ't+1 are valid, then designating the repeating steps (b), (c) and (d). 7. The communication station of claim 5, wherein if the symbol ρt+1 is considered valid and the symbol ρt+2 is considered invalid in step (d), then the symbol ρt+1 is designated ρt and is output, the first symbol rate q is reduced to q/2 and a new symbols ρ't+1 and ρ't+2 are computed from ρt+2, ρ't+1 and ρ 't+2 are decoded, and processed further depending on whether ρ't+1 and ρ't+2 are valid or invalid. 8. The communication station of claim 5, wherein if the symbol ρt+1 is considered invalid in step (d), then the first symbol rate q is reduced to q/2 and ρt is decoded as ρ't and ρ't+1, ρ't and ρ't+ 1 are checked, and are processed further depending on whether they are valid or invalid.