A method in a node (110, 115), comprising: receiving a wireless transmission encoded using a spatially coupled polar code, the spatially coupled polar code comprising a plurality of sets of information bits at least a portion of which have been coupled, each set of information bits associated with one of a plurality of constituent polar codes, wherein the at least a portion of the sets of information bits associated with each of the plurality of constituent polar codes are coupled using a coupling matrix that specifies how information bits from a first constituent polar code of the plurality of constituent polar codes are coupled to one or more other constituent polar codes of the plurality of constituent polar code, and wherein the coupling matrix is expressed as a block-wise upper triangular form; and decoding the wireless transmission encoded using the spatially coupled polar code using feedforward decoding, wherein decoding the wireless transmission encoded using the spatially coupled polar code using feedforward decoding comprises: decoding a plurality of coupled information bit vectors; decoding a first information bit; and decoding one or more remaining information bits sequentially, wherein decoding the plurality of coupled information bit vectors comprises: running a plurality of polar decoders in series, the plurality of polar decoders comprising a first polar decoder, wherein each of the plurality of polar decoders is associated with one of the plurality of constituent polar codes; generating, by the first polar decoder, one or more of soft output information; and providing, from the first polar decoder to at least one subsequent polar decoder in a series of the plurality of polar decoders, one or more of the soft output information generated by the first polar decoder, wherein the soft output information comprises a log likelihood ratio, and wherein the soft output information is derived based on a maximum a posteriori, MAP, probability of each bit. receiving a wireless transmission encoded using a spatially coupled polar code, the spatially coupled polar code comprising a plurality of sets of information bits at least a portion of which have been coupled, each set of information bits associated with one of a plurality of constituent polar codes, wherein the at least a portion of the sets of information bits associated with each of the plurality of constituent polar codes are coupled using a coupling matrix that specifies how information bits from a first constituent polar code of the plurality of constituent polar codes are coupled to one or more other constituent polar codes of the plurality of constituent polar code, and wherein the coupling matrix is expressed as a block-wise upper triangular form; and decoding the wireless transmission encoded using the spatially coupled polar code using feedforward decoding, wherein decoding the wireless transmission encoded using the spatially coupled polar code using feedforward decoding comprises: decoding a plurality of coupled information bit vectors; decoding a first information bit; and decoding a plurality of coupled information bit vectors; decoding a first information bit; and decoding one or more remaining information bits sequentially, wherein decoding the plurality of coupled information bit vectors comprises: running a plurality of polar decoders in series, the plurality of polar decoders comprising a first polar decoder, wherein each of the plurality of polar decoders is associated with one of the plurality of constituent polar codes; generating, by the first polar decoder, one or more of soft output information; and providing, from the first polar decoder to at least one subsequent polar decoder in a series of the plurality of polar decoders, one or more of the soft output information generated by the first polar decoder, wherein the soft output information comprises a log likelihood ratio, and wherein the soft output information is derived based on a maximum a posteriori, MAP, probability of each bit. running a plurality of polar decoders in series, the plurality of polar decoders comprising a first polar decoder, wherein each of the plurality of polar decoders is associated with one of the plurality of constituent polar codes; generating, by the first polar decoder, one or more of soft output information; and providing, from the first polar decoder to at least one subsequent polar decoder in a series of the plurality of polar decoders, one or more of the soft output information generated by the first polar decoder, wherein the soft output information comprises a log likelihood ratio, and wherein the soft output information is derived based on a maximum a posteriori, MAP, probability of each bit.