Apparatus and method for transmitting data with conditional zero padding
AssigneeHuawei Technologies Co., Ltd.
InventorsMing Jia, Jianglei Ma, Wen Tong
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Abstract
An apparatus and method for transmitting data with conditional zero padding is provided. In accordance with an embodiment of the disclosure, a transmitter transmits data to a receiver by transmitting symbols such that each symbol is preceded by a cyclic prefix of a fixed length and the symbol conditionally includes enough zero padding to avoid ISI (Inter-Symbol Interference) between consecutive symbols. In some implementations, if the fixed length for cyclic prefixes is long enough to avoid ISI between consecutive symbols, then the symbols may omit zero padding. Otherwise, the symbols may include enough zero padding to avoid ISI between consecutive symbols. The zero padding may be zero tail or zero head.
Claims35
A method for single carrier transmission, the method comprising:
- based on a channel delay spread for transmitting data to a receiver, determining whether a fixed length for cyclic prefixes is long enough to avoid Inter-Symbol Interference, ISI, between consecutive symbols;
- upon determining that the fixed length for cyclic prefixes is not long enough to avoid ISI between consecutive symbols, transmitting data to the receiver by transmitting symbols such that each symbol is preceded by a cyclic prefix of the fixed length and the symbol has a fixed length with enough zero padding to avoid ISI between consecutive symbols.
A non-transitory computer-readable medium having recorded thereon instructions that when executed by a processor implement a method for single carrier transmission, the method comprising:
- based on a channel delay spread for transmitting data to a receiver, determining whether a fixed length for cyclic prefixes is long enough to avoid Inter-Symbol Interference, ISI, between consecutive symbols;
- upon determining that the fixed length for cyclic prefixes is not long enough to avoid ISI between consecutive symbols, transmitting data to the receiver by transmitting symbols such that each symbol is preceded by a cyclic prefix of the fixed length and the symbol has a fixed length with enough zero padding to avoid ISI between consecutive symbols.
A transmitter comprising:
- a wireless access radio;
- and
- circuitry implementing a transmit function with the wireless access radio for single carrier transmission and being configured to:
- based on a channel delay spread for transmitting data to a receiver, determine whether a fixed length for cyclic prefixes is long enough to avoid Inter-Symbol Interference, ISI, between consecutive symbols;
- upon determining that the fixed length for cyclic prefixes is not long enough to avoid ISI between consecutive symbols, transmit data to the receiver by transmitting symbols such that each symbol is preceded by a cyclic prefix of the fixed length and the symbol has a fixed length with enough zero padding to avoid ISI between consecutive symbols.
A method for transmitting data to a receiver over a channel, the method comprising:
- determining that a cyclic prefix length associated with symbols in a transmission is insufficiently long to prevent Inter-Symbol Interference, ISI, between adjacent symbols;
- and
- responsive to the determination, inserting zero padding into one of the symbols to mitigate the ISI.
Dependencies are inferred from the claim text.