Provided are a data modulation method and apparatus, and a storage medium. The method includes: modulating a data sequence [b(i)] to obtain a data sequence [s(k)]; wherein [s(k)] has the following characteristics: in a case where k = 2 ⁢ i , s ⁡ ( k ) = e j ⁡ ( π 2 ⁢ ( i ⁢ ⁢ mod ⁢ ⁢ 2 ) + θ ) 2 ⁡ [ ( 1 - 2 ⁢ b ⁡ ( i ) ) + j ⁡ ( 1 - 2 ⁢ b ⁡ ( i ) ) ] , or ⁢ ⁢ s ⁡ ( k ) = e j ⁡ ( π 2 ⁢ i + θ ) 2 ⁡ [ ( 1 - 2 ⁢ b ⁡ ( i ) ) + j ⁡ ( 1 - 2 ⁢ b ⁡ ( i ) ) ] ; in a case where k = 2 ⁢ i - 1 , s ⁡ ( k ) = 1 2 ⁢ ( s ⁡ ( k - 1 ) + s ⁡ ( k + 1 ) ) , or ⁢ ⁢ s ⁡ ( k ) = ( s ⁡ ( k - 1 ) ⁢ s ⁡ ( k + 1 ) ) 1 2 ; wherein i and k are non-negative integers, and θ is a preset constant. The method includes: modulating a data sequence [b(i)] to obtain a data sequence [s(k)]; wherein [s(k)] has the following characteristics: wherein [s(k)] has the following characteristics: in a case where k = 2 ⁢ i , s ⁡ ( k ) = e j ⁢ ⁢ θ 2 ⁡ [ ( 1 - 2 ⁢ b ⁡ ( 2 ⁢ i ) ) + j ⁡ ( 1 - 2 ⁢ b ⁡ ( 2 ⁢ i + 1 ) ) ] ; in a case where k = 2 ⁢ i - 1 , s ⁡ ( k ) = ( s ⁡ ( k - 1 ) ⁢ s ⁡ ( k + 1 ) ) 1 2 ; wherein i and k are non-negative integers, and θ is a preset constant.