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US 11,196,598 B1Granted
Modulation scheme for high order constellation
AssigneeHuawei Technologies Canada Co., Ltd.
InventorsAssem Shoukry Mohamed Hussein, Vincent Charles Gaudet, Patrick Mitran, Ming Jian
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Abstract
Aspects of the present application provide methods and devices for using a combined QAM and APSK modulation scheme in a hybrid modulation form in order to benefit from advantages of each respective modulation scheme. The proposed hybrid modulation scheme is less sensitive to phase noise and has lower PAPR than QAM and has very similar performance as QAM with respect to AWGN.
Claims20
A method comprising:
- modulating a set of bits by mapping the set of bits as a symbol to a constellation point on a hybrid constellation, the hybrid constellation comprising a plurality of constellation points that comprise both a set of constellation points based on quadrature amplitude modulation (QAM) and a set of constellation points based on amplitude phase shift key (APSK) modulation, wherein the symbol mapped to the constellation point is a single constellation point in the hybrid constellation based on either QAM or APSK modulation depending on a value of the set of bits;
- and
- transmitting the modulated symbol.
A method comprising:
- receiving a symbol that was modulated by mapping a set of bits as the symbol to a constellation point on a hybrid constellation, the hybrid constellation comprising a plurality of constellation points that comprise both a set of constellation points based on quadrature amplitude modulation (QAM) and a set of constellation points based on amplitude phase shift key (APSK) modulation, wherein the symbol mapped to the constellation point is a single constellation point in the hybrid constellation based on either QAM or APSK modulation depending on a value of the set of bits;
- and
- demodulating the received symbol to recover the set of bits.
A device comprising:
- a processor;
- and
- a computer-readable medium having stored thereon computer executable instructions that when executed by the processor cause the device to:
- modulate a set of bits by mapping the set of bits as a symbol to a constellation point on a hybrid constellation, the hybrid constellation comprising a plurality of constellation points that comprise both a set of constellation points based on quadrature amplitude modulation (QAM) and a set of constellation points based on amplitude phase shift key (APSK) modulation, wherein the symbol mapped to the constellation point is a single constellation point in the hybrid constellation based on either QAM or APSK modulation depending on a value of the set of bits;
- and
- transmit the modulated symbol.
3 more elements
A device comprising:
- a processor;
- and
- a computer-readable medium having stored thereon computer executable instructions that when executed by the processor cause the device to:
- receive a symbol that was modulated by mapping a set of bits as the symbol to a constellation point on a hybrid constellation, the hybrid constellation comprising a plurality of constellation points that comprise both a set of constellation points based on quadrature amplitude modulation (QAM) and a set of constellation points based on amplitude phase shift key (APSK) modulation, wherein the symbol mapped to the constellation point is a single constellation point in the hybrid constellation based on either QAM or APSK modulation depending on a value of the set of bits;
- and
- demodulate the received symbol to recover the set of bits.
3 more elements
Dependencies are inferred from the claim text.