Single carrier transmission system, communication device, and single carrier transmission method using for them
AssigneeLenovo Innovations Limited (Hong Kong)
InventorsKengo Oketani, Yoshikazu Kakura, Toshifumi Sato, Shousei Yoshida
Life of this patent
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Abstract
A memory 21 of a pilot processing circuit 2 holds in advance a pilot sequence converted into a frequency region signal obtained by subjecting a pilot signal symbol transmitted in one block to Ntx_p-point DFT. The pilot sequence held in the memory 21 is subjected to a series of processes including a roll-off filtering by a roll-off filter circuit 22, subcarrier mapping process by subcarrier mapping circuit 23, an Ndft_p-point IDFT operation by an IDFT circuit 24, and a cyclic prefix adding process by a cyclic prefix adding circuit 25.
Claims3
A transmitter in a wireless communication system, the transmitter comprising:
- a transmission circuit configured to transmit a pilot signal;
- a processing circuit configured to calculate a sequence of the pilot signal based on at least a Zadoff-Chu sequence and a first value;
- wherein the Zadoff-Chu sequence is generated according to an exponential function,
- wherein an index of the exponential function is calculated according to a prime number, and
- wherein the first value is determined according to the prime number and a mod operator.
A communication control method of a transmitter in a wireless communication system, the method comprising:
- transmitting at least a pilot signal;
- calculating a sequence of the pilot signal based on a Zadoff-Chu sequence and a first value, the calculating the sequence of the pilot signal comprising:
- generating the Zadoff-Chu sequence according to an exponential function,
- calculating an index of the exponential function according to a prime number, and
- determining the first value according to the prime number and a mod operator.
A wireless communication system, comprising:
- a mobile station comprising a transmitter which transmits a pilot signal;
- and
- a base station comprising a receiver which demodulates a data signal based on the pilot signal;
- wherein the mobile station calculates a sequence of the pilot signal based on a Zadoff-Chu sequence and a first value;
- wherein the Zadoff-Chu sequence is generated according to an exponential function,
- wherein an index of the exponential function is calculated according to a prime number, and
- wherein the first value is determined according to the prime number and a mod operator.
Dependencies are inferred from the claim text.