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US 12,047,221 B2Granted
Telecommunication method with polar constellations and corresponding devices
AssigneeOrange
InventorBruno Jahan
Life of this patent
Estimating the term…
Abstract
A telecommunication method which includes mapping, by a mapper, input data to points of a constellation, modulating, by a modulator, points of the constellation to generate modulated symbols, and transmitting a radio signal representative of the modulated symbols. The constellation includes a set of N points, the coordinates of which expressed in polar form αn×ejφn, n=1, . . . , N, referred to as polar coordinates, are determined such that an+1=an+p, p>0, the real number being the pitch amplitude of the constellation.
Claims10
A telecommunication method implemented by a telecommunication equipment and comprising:
- mapping, by a mapper, input data to points of an N-order constellation comprising a set of N points, the coordinates of each point of the N points being expressed in polar form αn×ejφn, for n=1, . . . , N, and called polar coordinates, wherein the polar coordinates of the points of the constellation are determined per quadrant with a quadrant size taken from among {π/2, π, 2π}, wherein each quadrant comprises M points of the constellation with M taken from among {N/4, N/2, N} for quadrant size taken from among {ζ/2, π, 2π} respectively, and wherein per quadrant, for j=1, . . . , M−1:
- α1>0,
- αj+1=αj+p, with p being an amplitude pitch of the constellation, p>0 being a real number,
- φn is chosen according to a determined criterion, and
- wherein the points of the constellation are distributed in each quadrant over concentric circles with the amplitude pitch p between the circles and wherein in each quadrant there is at most one point of the constellation on each circle;
- modulating, by a modulator, points of the constellation order to generate modulated symbols;
- and
- transmitting a radio signal representing the modulated symbols.
5 more elements
A reception method implemented by a telecommunication equipment and comprising:
- receiving a radio signal representing modulated symbols;
- demodulating, by a demodulator, the modulated symbols in order to estimate points of an N-order constellation comprising a set of N points, the coordinates of each point of the N points being expressed in polar form αn×ejφn, n=1, . . . , N and called polar coordinates;
- and
- demapping, by a demapper, points of the constellation in order to estimate data mapped to these constellation points;
- wherein the polar coordinates of the points of the constellation are determined per quadrant with a quadrant size taken from among {π/2, π, 2π}, each quadrant comprising M points of the constellation with M taken from among {N/4, N/2, N} for a quadrant size taken from among {π/2, π, 2π} respectively,
- wherein per quadrant, for j=1, . . . , M−1:
- α1>0,
- αj+1=αj+p, with p being an amplitude pitch of the constellation, p>0 being a real number,
- φn is chosen according to a determined criterion, and
- wherein the points of the constellation are distributed in each quadrant over concentric circles with the amplitude pitch p between the circles and wherein in each quadrant there is at most one point of the constellation on each circle.
7 more elements
A telecommunication equipment, which comprises:
- a mapper which maps input data to points of an N-order constellation, the constellation comprising a set of N points, the coordinates of each point of the N points being expressed in polar form αn×ejφn, for n=1, . . . , N, and called polar coordinates, wherein the polar coordinates of the points of the constellation are determined per quadrant with a quadrant size taken from among {π/2, π, 2π}, wherein each quadrant comprises M points of the constellation with M taken from among {N/4, N/2, N} for a quadrant size taken from among {π/2, π, 2π} respectively, and wherein per quadrant, for j=1, . . . , M−1:
- α1>0,
- αj+1=αj+p, with p being an amplitude pitch of the constellation, p>0 being a real number,
- φn is chosen according to a determined criterion;
- and
- wherein the points of the constellation are distributed in each quadrant over concentric circles with the amplitude pitch p between the circles and wherein in each quadrant there is at most one point of the constellation on each circle;
- a modulator which modulates points of the constellation and generating modulated symbols;
- and
- a transmitter which transmits a radio signal representing the modulated symbols.
6 more elements
A telecommunication equipment, which comprises:
- a receiver which receives a radio signal representing modulated symbols;
- a demodulator which demodulates the modulated symbols and estimating points of an N-order constellation, the constellation comprising a set of N points, the coordinates of each of the N points being expressed in polar form αn×ejφn, for n=1, . . . , N, and called, polar coordinates, wherein the polar coordinates of the points of the constellation are determined per quadrant with a quadrant size taken from among {π/2, π, 2π}, each quadrant comprising M points of the constellation with M taken from among {N/4, N/2, N} for a quadrant size from among {π/2, π, 2π} respectively, and wherein per quadrant, for j=1, . . . , M−1:
- α1>0,
- αj+1=αj+p, with p being an amplitude pitch of the constellation, p>0 being a real number, and
- φn is chosen according to a determined criterion,
- wherein the points of the constellation are distributed in each quadrant over concentric circles with the amplitude pitch p between the circles and wherein in each quadrant there is at most one point of the constellation on each circle;
- and
- a demapper which demaps the points of the constellation and estimating data mapped to these constellation points.
5 more elements
Dependencies are inferred from the claim text.