Dual carrier modulator for a multiband OFDM transceiver
First Claim
Patent Images
1. A dual carrier modulator (DCM) for a multiband orthogonal frequency division multiplexing (OFDM) transceiver of an ultra wide band (UWB) wireless network transmitting OFDM modulated symbols, wherein each OFDM symbol is modulated by a first predetermined number (NCBPS) of encoded bits, said dual carrier modulator comprising:
- (a) a grouping unit configured to group the NCBPS encoded bits of a serial bit stream into bit groups each having a second predetermined number (m) of bits;
(b) a mapping unit configured to map each bit group received from said grouping unit to complex symbols (y); and
(c) a reordering unit configured to reorder the complex symbols (y) mapped by said mapping unit, wherein each complex symbol (y) is provided to modulate a corresponding data tone of an OFDM symbol.
5 Assignments
0 Petitions
Accused Products
Abstract
Dual Carrier Modulator (DCM) for a Multiband OFDM (Orthogonal Frequency Division Multiplexing) Transceiver of a Ultra Wide Band (UWB) wireless personal access network transmitting OFDM modulated symbols,
- wherein each OFDM symbol is modulated by a predetermined number (NCBPS) of encoded bits,
- said Dual Carrier Modulator (1) comprising:
- (a) a grouping unit (1-1) for grouping NCBPS encoded bits of a serial bit stream into bit groups each having a predetermined number (m) of bits;
- (b) a mapping unit (1-2) for mapping each bit group received from said grouping unit to complex symbols (y) using an orthogonal transform; and
- (c) a reordering unit (1-3) for reordering the complex symbols (y) mapped by said mapping unit, wherein each complex symbol (y) is provided to modulate a corresponding data tone of an OFDM symbol.
-
Citations
20 Claims
-
1. A dual carrier modulator (DCM) for a multiband orthogonal frequency division multiplexing (OFDM) transceiver of an ultra wide band (UWB) wireless network transmitting OFDM modulated symbols, wherein each OFDM symbol is modulated by a first predetermined number (NCBPS) of encoded bits, said dual carrier modulator comprising:
-
(a) a grouping unit configured to group the NCBPS encoded bits of a serial bit stream into bit groups each having a second predetermined number (m) of bits;
(b) a mapping unit configured to map each bit group received from said grouping unit to complex symbols (y); and
(c) a reordering unit configured to reorder the complex symbols (y) mapped by said mapping unit, wherein each complex symbol (y) is provided to modulate a corresponding data tone of an OFDM symbol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A metric computation unit for a multiband orthogonal frequency division multiplexing (OFDM) transceiver of an ultra wide band (UWB) wireless network, said transceiver receiving OFDM symbols transmitted via a data transmission channel wherein each OFDM symbol is dual carrier modulated (DCM) by a predetermined number (NCBPS) of encoded bits each modulating two data tones of the OFDM symbol, said metric computation unit comprising:
-
(a) a channel and noise estimation unit configured to estimate a channel response and a noise level for each data tone (n), or a group of adjacent tones, and calculate a corresponding estimated reception symbol (y(n));
(b) an equalizer operable to multiply each estimated reception symbol (y(n)) with an equalizer coefficient (eq(n)) in order to calculate for each data tone (n) a weighted reception symbol (w(n)=y(n)×
eq(n)); and
(c) a calculation unit configured to calculate for each bit transmitted via said data transmission channel a metric on the basis of weighted receptions symbols (w(n)) calculated by said equalizer for a group of data tones. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification