Block size detection for MPSK signaling
AssigneeAlcatel Lucent
InventorWalid Ahmed
Life of this patent
Estimating the term…
Abstract
A data transmission includes a sequence of information symbols followed by zero or more non-information symbols, which carry no power. A receiver determines the size of a data block, i.e., the number of information symbols in the transmission, by calculating a series of transition indicators. Each transition indicator represents a likelihood that a particular symbol position corresponds to a transition between the information symbols and non-information symbols of the transmission.
Claims20
A method for estimating a number of information symbols in a received data transmission, the method comprising:
- determining a transition indicator for at least one symbol based on the data transmission, the data transmission including a sequence of information symbols followed by zero or more non-information symbols;
- estimating a number of information symbols based on the transition indicator.
A data receiving apparatus comprising:
- a receiver configured to receive a MPSK data transmission;
- means for extracting a guiding channel from the data transmission, the guiding channel including a sequence of information symbols followed by zero or more non-information symbols;
- means for calculating a transition indicator for at least one symbol based on the guiding channel;
- means for estimating a number of information symbols based on the transition indicator.
A third generation Universal Mobile Telecommunications Service (UMTS) data receiving system comprising:
- a receiver configured to receive a Wideband Code-Division Multiple Access (WCDMA) data transmission;
- a demultiplexer configured to demultiplex the received data transmission into one or more UMTS transport channels;
- means for selecting a guiding channel from the one or more UMTS transport channels, the guiding channel including a sequence of information symbols followed by zero or more non-information symbols;
- means for identifying an information symbol in the guiding channel having a maximum likelihood of being the last information symbol in the sequence of information symbols;
- means for determining a transport format of the guiding channel based on the identified information symbol.
Dependencies are inferred from the claim text.